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Why does a dog get black spots?

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This type of neoplasm has a very dense, elastic consistency. The tumor has a tendency to rapid infiltrative growth into the bone tissue, but it does not give metastases so often.

does, black, spots

The only treatment is surgery. Radio and chemotherapy usually do not give a pronounced effect. In view of the high aggressiveness and in the case of deep damage to the bones of the pet’s skull, it is recommended to euthanize the animal. The prognosis is slightly better only with minor damage to the tongue and teeth (and the latter will have to be removed).

The main reasons for the appearance of black spots on the tongue

Alas, these symptoms do not appear just like that. But still, in many cases, they can be just age spots that can appear on any part of the body.

True, even in this case, you should not relax, since the age spot at any time can “mutate” into something more serious:

  • Melanoma. This is a malignant tumor, which, according to statistics from veterinarians from all over the world, is especially common in dogs. The neoplasm is usually dark in color. It is very aggressive, which is why areas of ulceration often appear at the site of the spots, as well as around them.
  • Epidermoid carcinoma. It also belongs to the category of malignant neoplasms. Typically, it is found in dogs eight years of age and older. In younger animals, this type of oncology rarely develops. Usually localized based on language. The tumor is extremely aggressive, but not prone to rapid metastasis.
  • Fibrosarcoma. And in this case we are talking about a malignant neoplasm. It is believed that it is fibrocarcinoma that occurs in about 20% of all cases of neoplasms in the oral cavity. The tumor itself is characterized by low aggressiveness, but is prone to metastasis to the lungs. In about 70% of cases, by the time it is detected, there are already foci in the lungs.
  • Sticker’s sarcoma. Usually, this malignant tumor affects the genitals, but with frequent licking, transmissible transmission is possible.


As we already wrote, it is distinguished by a dark color, usually painted in a gradation of black or dark brown shades. In addition, cases have been described when there is no pigment at all in the thickness of the melanoma, which makes the tumor look like a white growth. The stage of cancer in this case can be determined by measuring the size of the neoplasm:

  • At the first stage, it is no more than 2 cm.
  • The second stage is characterized by a size of about two to four centimeters.
  • In the third stage, the diameter of the tumor can reach five more centimeters.
  • The classification of the fourth stage is controversial. Its size can be almost any, but in this case, the neoplasm already has time to give metastases to the internal organs.

Drug treatment is ineffective. Surgery gives good results only in the first stage, and the average life span in this case rarely exceeds two years. In the fourth and third stages, euthanasia is recommended, since even after a successful operation, the animal rarely lives more than three months. To increase the duration and improve the quality of life, it is recommended to conduct radio and chemotherapy.

Characteristics of Tongue Tumors

Since each of these neoplasms has its own “character”, each type of tumor must be described separately.

Pydermoid carcinoma

Ranked second in terms of occurrence. Despite the weak tendency to metastasis, this type of neoplasm is considered one of the most dangerous. Survival is low and there is no effective treatment. After surgery, life expectancy rarely exceeds nine months. If the treatment is supplemented with radio and chemotherapy, it is possible to extend the life of the pet up to about one and a half years.

Causes of the formation of black spots on the dog’s tongue

You don’t need a medical background to understand how oral health affects your dog’s appetite and therefore overall health. Any pathology of this part of the body is fraught with the loss of both. Sometimes they point to deadly pathologies. If the dog has black spots on the tongue, a veterinarian consultation is necessary.

Sticker’s sarcoma

As in the past, this type of malignant tumor is characterized by aggressive behavior, but it is much better treatable. If the lesion is small (no more than three centimeters), vincristine and additional radiotherapy give good results. With timely detection of a tumor and promptly started treatment, the survival period can be raised to five years or even more.

If the diameter of the neoplasm exceeds four centimeters, the only way to save the dog is aggressive surgery with the removal of all affected and suspicious tissue, supplemented by radio and chemotherapy.

Pigmented neoplasms

Brown spots on the dog’s skin can be a symptom of a malignant disease. melanoma. This disease affects not only humans, but also animals. The tumor develops from melanocytes and progresses rapidly, forming metastases in other organs.

The tendency to develop pigmented malignant neoplasms is higher in small dogs. dachshunds, Yorkies, pugs. A risk factor may be a genetic predisposition, prolonged exposure to ultraviolet radiation.

At an early stage of the disease, the tumor is surgically excised. The problem is that it is almost impossible to notice the disease at the initial stage, because most often melanoma is hidden by wool. Usually, the owners notice the tumor when it is already progressing and affects the general condition of the pet. In advanced stages, treatment is possible only with the help of chemotherapy and radiation therapy, however, veterinarians most often suggest euthanizing a sick animal so as not to wait for a natural painful death.

Other causes of dark spots on your dog’s body

Acantoderma is not the only cause of skin darkening in an animal. There are several diseases that can cause similar manifestations: LenTiggo simplex, atopic dermatitis, skin neoplasms, metabolic and endocrine disorders. How to determine the cause of skin blackening?

A dog has dark spots on the skin: causes and symptoms of acanthosis black and similar diseases, home treatment

Darkening of the skin in a dog can be caused by many reasons and can be both hereditary and acquired. Black or brown spots are often a sign of hormonal imbalance, metabolic disorders, atopic dermatitis, but the disease can be much more dangerous: for example, one of the most aggressive malignant tumors, melanoma, also manifests itself. How is acanthosis diagnosed and how to treat it?

Treatment of black acanthosis in a pet at home

What if the animal has dark spots? Only a veterinarian can make a diagnosis. To do this, the doctor sends a biopsy of tissue from the problem area. Diagnostics consists in excluding diseases with similar symptoms. food allergies, atopic dermatitis, endocrine disorders.

If the skin and nails darken due to a hereditary predisposition, then it will not be possible to achieve complete recovery. With primary acanthoderma, supportive therapy is prescribed: glucocorticoids, antihistamines. Black spots are very itchy, so the dachshund is washed with special shampoos and sedatives.

With secondary acanthoderma, complex treatment is prescribed, which can take place at home. It involves the use of tools such as:

  • Systemic glucocorticoids. The course of treatment lasts 7 days. The drug is given by mouth or injections.
  • Vitamins. The course of therapy continues for 3 months. Vitamin E is predominantly prescribed, but other vitamin complexes may also be prescribed.
  • Antibacterial shampoos. Since the dark spots constantly itch, wounds form on them, an infection can get inside. It is recommended to wash the dog more often with antimicrobial shampoos.

What to do if skin and nails are darkened due to staphylococcal infection? In such a situation, the veterinarian prescribes immunostimulants and antibiotics: Baytril, Tsiflox, Enroxil. In advanced cases, the staphylococcal vaccine “Antifagin” is used, which is administered subcutaneously.

For obesity, which has contributed to the blackening of the dog’s skin, a low-calorie diet is prescribed. The animal is prescribed physical activity, a set of exercises that will help reduce weight.

Acanthosis nigricans cannot be left untreated. If the dog is not taken to the vet in time, the disease will progress. The dark spots are itchy, so the animal will comb them until it bleeds. Bleeding, non-healing ulcers form on the abdomen, neck, groin, which can very easily get infected.

LenTiggo simplex

LenTiggo is a benign neoplasm that consists of melanocytes. The causes of Tiggo simplex can be varied, ranging from genetic characteristics to UV exposure, especially in smooth-haired and hairless dogs. Occasionally, dark spots can degenerate into malignant tumors.

In contrast to acanthosis, with LenTiggo, age spots protrude above the level of the skin. They are painless, not itchy, and not prone to ulceration. In most cases, the disease does not require treatment, unless the animal systematically damages the speck or there is no threat of its degeneration.

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Hormonal imbalance

One of the most common causes of skin darkening is hormonal disruptions. The thyroid gland is the most important organ that regulates many processes in the body, including growth and metabolism. If the thyroid gland is malfunctioning, a malfunction occurs, one of the symptoms of which may be the formation of brown or black dots.

Hyperpigmentation can result from an imbalance in sex hormones. At risk are pets over 5 years old that have been castrated. Treatment is performed with hormonal drugs: injections, ointments, creams.

Forms, causes and symptoms of acanthosis black in dogs

Why does the skin on the body of a Yorkie or a pug turn black? Acanthosis. hyperpigmentation, in which certain areas of the skin darken, become almost brown and even black. The disease occurs in humans and pets, including dogs. Most often, spots appear in the folds. on the neck, paws, abdomen, in the groin, under the arms, on the nipples, and nails. What does acanthosis black look like in dogs, you can see the photo.

Primary acanthokeratoderma

Veterinarians distinguish three forms of acanthoderma:

  • primary;
  • secondary;
  • pseudoacanthosis.

The primary form of the disease occurs in representatives of only one breed. dachshund. Dachshund diseases can manifest themselves regardless of the sex or age of the dog. The causes of hyperpigmentation are unknown, but since the disease occurs in only one breed, we can talk about genetic abnormalities and hereditary predisposition.

Allergic pathologies

Allergy refers to the reaction of antibodies present in the dog’s body to stimuli. This results in histamine activity. Reacting with blood particles, it provokes the development of the inflammatory process.

Chemicals can act as an allergen.

Black Skin Disease | Skin Disease in Dogs | Dr Pallabi Vet

  • medicines;
  • food;
  • fleas;
  • allergens.

The most dangerous drugs are the groups of penicillins.

Often, an allergic reaction is instantaneous. It can also appear 2-3 hours later or several days after contact with an irritant.

Reasons for the formation of dark marks

The appearance on the dog’s skin of various marks and marks can be caused by the following conditions and diseases:

LenTiggo. Traces of this disease are found on the belly and paws of the animal, less often found on other parts of the body. LenTiggo. cosmetic skin defect, there is no effective treatment.

Dermatophytosis. These are fungal infections that appear on the dog’s body with spots of various shapes and sizes. Most often they form dark spots on the skin of a dog, located on the face, neck, paws and in the anal region. They are mainly characterized by the appearance of flaky, inflamed, crusty or weeping marks, characterized by severe itching. The dog actively scratches the painful areas, spreading the infection throughout the body and introducing additional various bacteria, which further exacerbates the situation.

Acute weeping dermatitis. Appears when the dog strongly scratches the skin and introduces bacterial microflora into the wounds. Scratching causes severe itching, the dog itches and further spreads the infection. Because of this, dark spots appear in the groin and other areas, covered with a crust from constant injury. Also, pus accumulates on the comb and the ichor may flow.

Dark spots on a dog’s belly may be comedones. These are the openings of the sebaceous glands, enlarged and clogged with sebaceous plugs, or inflamed hair follicles. An outwardly harmless skin condition is the result of serious endocrine problems in the body or a secondary symptom of demodicosis. In miniature schnauzers, the primary comedones. black dots on the back. are a cosmetic defect that does not need treatment, genetically characteristic of this breed.

Black spots on the skin of a pet can be a manifestation of allergies. to food, cosmetics, drugs and much more.

Demodectic mange covers the paws of the animal with a reddish rash, similar to scabies. This microscopic mite can provoke severe itching and scratching, in the place of which dark spots appear, covered with a dry flaky crust.

Seborrhea. With this disease, dark marks appear on the skin, the coat deteriorates, tarnishes, falls off, breaks and falls out. Scales and dandruff form on the skin, accompanied by skin irritation and itching.

Hormonal disorders. They are usually accompanied by increased skin greasiness, an unpleasant odor from the animal, skin blemishes and itching, and baldness.

Since there are many reasons for the appearance of black marks on the skin of a dog, and they are all different, the most important action of the owner of the animal is a visit to the veterinary clinic to establish the correct diagnosis.

Comedones in dogs

Comedones. this is one of the types of skin lesions found in various diseases, outwardly look like blackheads. In fact, they are a plug, consisting of the secretion of the sebaceous glands and keratinocytes, which clogs the mouth of the hair follicle.

Most often, comedones can normally be seen on the skin of hairless dog breeds (Chinese crested, etc.), since in such dogs the sebaceous glands work more actively and produce more secretion (sebum) than in other dog breeds. In other cases, black dots are signs of a particular disease.

Primary comedones in dogs appear on the skin with endocrinopathies. For example, thyroid hormones regulate hair growth, keratinization processes, and the work of the sebaceous glands. In case of dysfunction of the thyroid gland, a violation of the change of hair occurs, the production of sebum is disrupted (hypersecretion of the sebaceous glands), comedones are formed.

The second disease in which primary comedones occur is Comedone Schnauzer Syndrome. This is a hereditary disease that occurs only in miniature schnauzers and is manifested by the appearance of comedones on the back. This is a cosmetic defect and it is not always necessary to treat it. Topical products such as shampoos containing benzoyl peroxide are usually sufficient. They cleanse the skin well and suppress the formation of blackheads. In some cases, systemic antibiotic therapy is required when secondary microflora is attached, if the hair follicle ruptures and, as a result, its inflammation (folliculitis).

Also, primary comedones are found in such a hereditary disease as sebadenitis. It is an autoimmune disease, i.e. the body’s immune cells attack the sebaceous glands, disrupting their function and causing inflammation. Akita Inu, poodles, dachshunds, Samoyeds are predisposed to sebadenite. The disease may also not cause concern to the dog and be only a cosmetic defect (comedones, areas of hypotrichosis or alopecia). In some cases, it is necessary to use immunosuppressants to reduce inflammation and antimicrobials to fight secondary infection.

Secondary comedones in dogs are one of the symptoms of demodicosis. Demodex affects the hair follicles, while there is an increased secretion of sebum in the hair follicle, its blockage and the formation of comedones occur.

Also, secondary comedones can occur with dermatophytosis.

If a large number of blackheads appear on your dog’s skin, you need to show it to a dermatologist to find out the reasons for their formation.

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Symptoms of Acanthosis Black in Dogs and Photos

In general, the clinical picture for all three types of the disease looks similar. Most often, at first, the disease is localized in the axillary region, but it can also be present in the area of ​​other folds:

  • In the groin folds;
  • In the intergluteal area;
  • Around the navel;
  • In the area of ​​the knees and elbows;
  • In the auricles;
  • In the folds of the neck.

As a result of the lesion, there is a significant darkening of the skin, the formation of a hard layer. At first, the surface darkens slightly, but over time it approaches black. With the secondary type of the disease, it is possible to identify the main focus from which the inflammation spreads. In the primary form, the damaged areas are equivalent relative to each other.

A photo. Acanthosis black in a dog Photo. Dachshund acanthosis
Over time, coarsening becomes more noticeable and palpable. The number of folds increases, growths of various sizes are formed between them. In parallel, baldness of the affected areas can be observed, sometimes there is an unpleasant odor. Sometimes the dog reacts violently to touching the darkened areas, as this gives it painful sensations.

Note! Itching, constant scratching of sore spots by the dog is characteristic only of secondary acanthosis nigricans. In the primary case, the animal does not experience unpleasant sensations from changes in the skin structure.


Causes of red spots on a dog’s body

In addition to serious diseases that require contacting a dog doctor, there are a number of other causes of red spots:

  • allergy. A dog’s reaction to an allergen can be easily identified by vomiting. An allergic reaction to a chemical / synthetic drug most often manifests itself on the belly of a dog. Red spots, redness, and itching are more likely to occur after exposure to chemicals.
  • prickly heat. In hot weather, breeds of increased shaggy risk getting prickly heat. A rash on the dog’s belly, left unattended by the owner, turns into wet scabs. And then suppuration occurs. Knowing the predisposition of your dog to prickly heat, it is necessary to transfer the time of walking to the morning and evening hours.
  • ticks and fleas. Parasite bites leave red marks on the animal’s body. Flea infestation is easily identified by careful examination of the dog’s coat. To detect ticks, the body of the animal is examined with special attention. The use of antiparasitic drugs and the wearing of a special collar is aimed at preventing ticks and fleas.
    red spots on the tongue of a dog are not a cause for concern if there are no other pronounced symptoms. In case of deterioration of the animal’s health, it is shown to the veterinarian.

The use of the simplest external agents helps to eliminate dermatological problems. However, it is important to observe the animal and respond to negative symptoms. Any negative change in the dog’s health is a reason to visit a veterinary clinic to help your pet.

Skin diseases in dogs

The largest organ of a dog’s body is the skin. This is a powerful barrier that stops the penetration of dangerous microorganisms into the body. As a unique thermostat and natural “conditioner”, leather has a number of important functions.

By its condition, the owner can determine whether the pet is healthy or sick. The following factors have a negative effect on the skin:

  • Hormonal imbalance.
  • Hypovitaminosis.
  • Cardiac pathology.
  • Unbalanced diet.
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An unbalanced diet can cause skin diseases.

Clinical picture

  • Itching.
  • Neoplasms.
  • Inflammation.

Itchy skin conditions in dogs.

The skin usually itches constantly and very hard. The dog suffers, cannot sleep, worries, twirls on its bed. As a result of combing, wool falls out, wounds form. Sometimes the animal bites itself on the paws or the base of the tail.

Blisters, warts, or plaques may appear on the skin. The size of the neoplasms varies from a few millimeters to 1–1.5 cm. Their shade can be pinkish or burgundy. Plaques scaly and itch even more.

If an infection gets on the affected area, then inflammation develops. The skin swells up a lot. Sometimes suppuration appears.

Treatment methods

Since the pathology is fungal, it is unlikely that it will be possible to cope with it with “little blood”. The treatment is complex, long enough:

  • Antifungal ointments based on miconazole, ketoconazole, clotrimazole. They are applied to the affected areas up to twice a day, the treatment period is about two weeks, but it often has to be stretched up to a month.
  • In addition, areas of growth of the fungus can be treated with a 0.2% aqueous solution of fluconazole. The brevity of use is also twice a day, the duration of therapy is up to two weeks (as in the previous case, the duration of treatment will probably have to be increased).
  • The condition of the animal can significantly improve multivitamin preparations.

Black spots or dots on the dog’s belly

By the state of the pet’s skin, one can almost always judge the general state of health of the animal. In particular, black spots or dots on a dog’s belly often indicate various dermatological pathologies, some of which can be dangerous to the dog’s health (while others are even fatal).

Dermatitis of parasitic origin

In addition to fleas, other types of parasites (ticks, lice and other bloodsuckers) “live” on the skin of dogs. Their activity can also lead to the development of inflammatory processes. Constantly bitten skin is an excellent gateway for infection, it is easily seeded by pathogenic and conditionally pathogenic microflora. One of the symptoms of such dermatitis can also be numerous black spots on the skin of the dog’s belly.

Treatment methods

In mild cases, when flea infestation has not yet led to pronounced consequences, the dog’s condition returns to normal after using antiparasitic agents. In this case, it is recommended to lubricate the bite sites with brilliant green or alcohol tincture of iodine. In more severe cases, the treatment is complex:

  • The lesions are lubricated with the same compounds about twice a day.
  • The animal is prescribed antihistamines (Zyrtec, Diphenhydramine, Suprastin, etc.). They relieve itching and prevent scratching of bite sites.
  • Antiparasitic drugs are used (in the form of drops, sprays, flea collars).
  • If the bite sites tend to ulcerate and further aggravate the inflammatory process, broad Spectra antibiotics and anti-inflammatory corticosteroids may be prescribed.

Flea dermatitis

However, do not immediately suspect the worst. Veterinarians and experienced breeders know that in most cases the appearance of small black dots on the dog’s belly is a sign of “commonplace” flea dermatitis (more precisely, its initial stages). This pathology manifests itself quite characteristic:

  • As a rule, it only comes to dermatitis in cases of extremely intense flea infestation. At the same time, it is difficult not to notice how many fleas there are on the dog. Sometimes it is the sucked parasites (the skin on the abdomen is thin and delicate) that are mistaken for “black spots“.
  • The dog itches constantly, cannot sit quietly, eat, even during sleep, the pet “breaks down” from time to time and begins to itch.
  • Small black dots appear on the skin (areas of dried blood and parasite secretions).


This name hides an interesting pathology of yeast origin. It is interesting in that the causative agent of malasseziosis under normal conditions for an animal is not only not dangerous, but is also a common representative of the symbiotic microflora of the skin. But with a significant deterioration in immunity, yeast can cause illness. As a rule, such an outcome is either a consequence of a prolonged, long and severe pathology of another origin, or a long, unjustifiably prolonged supply of corticosteroids, antifungal agents and antibiotics.

In addition, the first foci of malasseziosis never appear on the abdomen. They always appear between the toes and on their pads, less often in the genital area of ​​the animal. And only later the lesions pass to the abdomen, and sometimes to other parts of the pet’s body, including the muzzle.

Symptoms of the disease, with the following:

  • Since the first foci of the disease appear on the paws, you need to look at them. Loose, whitish-yellow growths appear between the fingers with malassezia.
  • A strong and rather specific smell emanates from the lesions. Some people compare it with the aroma of old cheese, to others it looks like “amber” from equally old socks. In any case, it is difficult not to notice this sign.
  • At first, the fungus does not cause any particular inconvenience to the dog, but soon soreness and itching appear. The dog tries to lick these places, rubs them with its paws (which only contributes to the deterioration of the skin condition and increased soreness).


Alas, outwardly harmless black spots can be a sign of deadly oncological pathologies (melanomas, sarcomas, etc.). The diagnosis is made on the basis of cytological examination of tissue samples. Treatment depends on the prognosis and condition of the animal. Surgical removal of tumors with their further “finishing off” with the help of radio and chemotherapy is recommended.

Diseases manifested by the appearance of spots on the skin

Epidermal nevus

A nevus is considered a defect in the development of the skin, which is hereditary. Nevi can be linear and can relate to peripheral nerves along them. Epidermal nevi can vary in color, which is due to the degree of pigmentation. As a treatment, they are removed by surgery or laser surgery is used.

Other diseases

  • Post-inflammatory hyperpigmentation. Hyperpigmentation lesions can appear around areas of inflammation. Often this type of hyperpigmentation has the appearance of a lattice, sometimes plaque or hyperpigmented area.
  • Hormonal hyperpigmentation. The disease develops as a result of hormonal or metabolic disorders that affect melanocytes. But the mechanism of the disease is not fully understood.
  • Medication-induced hyperpigmentation. Staining is caused by medication that causes hormonal changes and hyperpigmentation. In addition, some drugs cause stains due to iron deposits.
  • Papillomavirus. It often appears in older dogs and is characterized by the appearance of nodules of various colors, ranging from flesh to black. Lesions can self-regress.
  • Pigmented tumors. Frequent pigmented tumors. melanomas and melacitomas.

Black spots on the skin of a dog: causes and treatment

The appearance of black spots may indicate serious pathological changes in the dog’s body. Therefore, the pet owner needs to pay due attention to the dog’s health and seek advice from a veterinarian for examination and treatment.


This disease manifests itself in dark areas of the skin. There are 2 types of acanthokeratoderma: primary and secondary.

1st acanthokeratoderma is a genetic disease that cannot be cured, but requires maintaining the condition of the skin with melatonin injections, taking steroid drugs.

2nd acanthokeratoderma can manifest itself in any dog ​​due to a number of several reasons: diseases of the endocrine system, allergies, chafing of certain parts of the body.



This disease is observed in adults. It is characterized by multiple black spots on the ventral part of the trunk. The spots are painless and do not bother the pet. Pigmentation lesions remain unchanged throughout the dog’s life.


Atopic dermatitis

Atopy is a genetic inflammatory disease that is manifested by an increased sensitivity to allergens such as dust and pollen. This type of disease is characterized by the ingress of allergens not only through the digestive system, but also through the skin and lungs. Atopic dermatitis cannot be cured, but the health of the pet can be improved, for example, by reducing the number of allergens by moving to another location.

Symptoms of the disease: itching, pigmentation disorders due to scratching, the appearance of spots from bright pink to bluish-black. If the integrity of the skin is damaged, a secondary infection of a bacterial or viral etiology is attached. Atopic dogs often have ear infections, runny nose, diarrhea.

Atopic dermatitis

Black spots on the skin of a dog: photo, causes, treatment

The appearance of black spots on the dog’s skin is not dangerous, provided that their nature is associated with hormonal disorders. If the changes on the body are accompanied by the strange behavior of the animal, then there is a risk of developing internal diseases, which can manifest themselves in the form of spots on the body of a predominantly dark color.

There is also the possibility of developing fungal infections and parasite activity, which can cause blackening of certain areas of the pet’s skin.

Black spots on the body of a dog photo


Fungal skin lesions, which manifests itself in the form of hair loss and darkening of the skin in this place. Itching is present, but not intense. Most often infected from cats.

The diagnosis is made only after microscopy of hair and scales from lesions. Treatment is long-term (it can take up to 2 months) with mandatory control bacterial cultures. Topical Triderm or oral Rumicosis may be prescribed.

Safe options

The owner should not worry if he found a black spot on the body of his dog that does not protrude above the surface of the skin, does not increase in size and does not bother the animal in any way. This may be a common skin pigmentation, which occurs mainly in adults and representatives of certain breeds.

The reason for their appearance may be related to:

  • hormonal disruptions in the body (pregnancy, childbirth, age);
  • a feature of the breed (English and French bulldogs, pugs, Shar Pei, dachshunds, etc.);
  • permanent injuries in the places of their appearance.

In most cases, age spots appear on the abdomen and groin. The size ranges from a small coin to a large saucer.

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Possible diseases

The appearance of black spots on the dog’s skin does not always indicate physiological norms. There are a number of diseases that can provoke this symptom:


It has many forms and varieties. There is a predisposition for some breeds (English Bulldogs often suffer from allergic dermatitis, and Shar Pei. contact dermatitis). May manifest itself as red and black spots on the dog’s body that itch terribly.

Due to constant scratching, there is no hair in this place, wounds appear. There is no treatment as such, because it is necessary to exclude the allergen that provokes the symptoms. If the animal is difficult to tolerate the manifestations of dermatitis, then antihistamines and anti-inflammatory drugs can be prescribed.


Bacterial skin lesions, which often occur against the background of other diseases. It can be deep and superficial. The superficial form provokes the appearance of small rashes on the dog’s body, which dry out and scar over the course of the process. In this place, there may be no fur and blackening of the skin.

The deep form is accompanied by the appearance of large ulcers, which scar and heal for a long time. All this causes the pet terrible discomfort, since the rash is very itchy and painful. This disease is not transmitted to humans and other animals, therefore it is dangerous only for a sick dog.

Diagnostics includes microsporia of scabs from lesions. Based on the analyzes and the severity of the symptoms, a course of effective antibiotics is selected, which are combined with the use of special shampoos.

Particular attention is paid to the implementation of all the doctor’s recommendations and control bacterial culture after the disappearance of all symptoms. Pyoderma is often a recurrent disease with a tendency to a chronic course.

Black dots on the belly of a dog

The skin is the most important organ that protects the body from the effects of various pathogenic factors. But in some cases, the skin itself suffers from a pathological effect. Often black dots appear on the belly of the dog. They can be the result of inflammatory processes in the dermis. Pigmented skin tumors are becoming more common in dogs. Also, these symptoms can talk about parasitic, infectious or allergic diseases. To choose the right treatment, a complete examination of the dog is necessary.

Malassezia. a fungal disease of the skin of dogs

Skin inflammation is caused by yeast from the genus Malassezia. The disease is poorly understood in veterinary practice, since they began to encounter it only in the last 20-30 years. There are many types of malassezia, in dogs M. pachydermatis causes dermatitis. This pathogen is sometimes found on human skin, but there are practically no cases of the disease.

The causative agent belongs to the group of opportunistic microorganisms that normally inhabit the skin of dogs. The disease develops with the additional influence of a number of factors:

  • heat;
  • high humidity;
  • weak immunity;
  • primary skin pathologies;
  • improper work of the sebaceous glands.

Often the disease is observed in dogs with skin folds (Shar Pei, Pugs, Bulldogs), where a favorable environment is formed for the yeast. The growth of microorganisms is activated, the waste products of which irritate the dog’s skin. A primary focus of inflammation is formed, which is complicated by another microflora.

Skin diseases & bad body odour in dogs

In dogs, the skin of the inner surface of the ear, fingers, groin, armpits is more often affected. Otitis media with malasseziosis is widespread, while the dog shakes its head, combs its ears, there are outflows from the ear canals. With a complication of bacterial microflora, purulent otitis media develops, perforation of the tympanic membrane.

Redness and pustular rash appear on the skin. A characteristic sign is thickening of the skin with a change in pigmentation. black spots. Due to the defeat of the sebaceous glands, a strong unpleasant odor appears.

The diagnosis is considered established after laboratory tests. The fingerprints are dried in air or fixed on the flame of an alcohol lamp and stained according to Gram. Microscopy reveals oval-shaped mushrooms. The diagnosis is clarified by culture crops.

For local treatment, special shampoos Nizoral and Laktaderm are used. Chlorhexidine solution is applied to the damaged areas twice a day. Ketoconazole is used systemically to suppress fungi, daily for 3 weeks.

Preventing this fungal skin lesion in dogs is straightforward. The infection develops with reduced resistance, therefore, normal conditions of detention will save the animal from problems.

Establishing the causes of black spots

Determination of the etiological factor of the disease and the correct diagnosis are necessary for the rational organization of treatment. It is necessary to completely collect anamnesis, conduct a clinical examination and prescribe functional diagnostic methods. It is a big mistake to prescribe symptomatic treatment. In addition, the symptomatic picture is often blurred by the use of antibiotics and other drugs. First of all, you should familiarize yourself with the complaint of the owner, who noticed changes in the behavior, appearance of the animal. At the same time, the general condition of the pet is checked:

  • behavior (activity, reaction to stimuli). apathy is characteristic of hypothyroidism;
  • changes in appetite, increased thirst. occurs with improper use of steroid drugs, hyperadrenocorticism;
  • the presence of signs of indigestion occurs with intoxication;
  • the nervous clinic is also characterized by hyperadrenocorticism;
  • conjunctivitis and other eye diseases with allergies;
  • otitis media, ear canal diseases with allergic reactions, metabolic pathologies;
  • exhaustion as a result of neoplasms, metabolic disorders, chronic disease.

It is important to find out the nature of the pet’s environment. Are there other animals in the house or the dog may be in contact with stray animals. It is also worth finding out the presence of similar signs in people. the defeat of fungal diseases, ticks is common. It is necessary to clarify the place of keeping the pet (bedding, room).

After they begin to study the place of the pathological process. It is necessary to clarify the location of the spots, the primary focus of their appearance. Perhaps the spots have a seasonal predisposition to appear (allergies, flea dermatitis) or the disease is progressing. The presence of itching is specified, whether the spots are troublesome to the dog. It is important to know the previous treatment. the use of special drugs, treatments for fleas and ticks.

Examination of the skin includes examination of all integuments, and not only in a place with severe lesions. Mucous membranes are also studied. The character of the coat is noted. oily skin, color and structure of the hair, the presence of bald patches. The skin on the abdomen, neck, perineum, base of the ears is carefully examined. During the examination, the temperature of the skin, the condition of the surface, the presence of various kinds of damage are noted.

Taking anamnesis and a complete clinical examination allows you to make a preliminary diagnosis and choose a direction for further examination of the dog. Test with wet paper for fleas.

If necessary, skin scraping is done in the area of ​​the pathological process. It is carried out with a scalpel on the border of the affected and healthy areas. The pathological material is discolored with an alkaline solution and examined under a microscope. Also, material is selected for cytological research for bacterial and fungal infections.

Comedones. damage to the sebaceous glands

When the hair follicles are blocked by the secretion of the sebaceous gland, dead epithelium, skin lesions that look like black dots are formed. This pathology is common in hairless dog breeds due to the high activity of the sebaceous glands. In other animals, comedones are less common and more common as a secondary disease.

A common cause of blackheads is hormonal imbalance. The thyroid gland normally regulates sebum production and hair growth. Metabolic pathology and hormonal disorder leads to increased sebum production and the formation of comedones. There is a genetic predisposition to this disease in dogs of the Schnauzer breed. they develop rashes along the spine.

Blackheads appear when dogs are affected by demodicosis. mites invade the skin and hair follicles, causing dermatitis.

For treatment, shampoos containing benzoyl peroxide are usually used. This product thoroughly cleanses the skin, removing the formed comedones and preventing the appearance of new ones. Often, the disease is complicated by a secondary infection, then systemic therapy is used. antibiotics, sulfonamides, skin treatments with antiseptics, anti-inflammatory drugs.


Excessive pigment deposits in the skin and hair are possible in dogs. A number of animals (pugs) have a genetic predisposition called flaxTiggo. The disease manifests itself in sexually mature individuals. Tar spots appear on the abdomen and gradually spread throughout the body, may increase and decrease. The diagnosis is made on the basis of the clinical picture and is confirmed by a biopsy of the altered skin area. LenTiggo does not harm or disturb the pet, so no treatment is required.

Reasons for acquired hyperpigmentation:

  • bacterial and fungal infections;
  • chronic forms of allergies;
  • demodicosis;
  • hypercortisolism, hyperadrenocorticism.

Pigmented lesions are common in adult dogs. Small breed males are predisposed to melanoma. Pathology develops on the skin of the muzzle, trunk and paws, as well as on the oral mucosa. The mechanism of tumor development has not been studied, it was previously believed that the main pathogenic effect belongs to solar radiation, but now this theory is rejected.

When diagnosed with melanoma, a poor prognosis is given. Diagnostics takes into account clinical examination. it is important to control the growth of pigmented spots. Melanoma confirmed by biopsy of the damaged area.

At an early stage of melanoma, surgical treatment with removal of the primary focus is possible. With the spread of neoplasms and the formation of metastases, chemotherapy and radiation therapy must be used. It is also necessary to increase the immune status.

Pigmented neoplasms in dogs are characterized by a rapid rate of development and early generalization of the process. It is impossible to maintain health without a timely diagnosis. Detection of a skin tumor requires immediate treatment.