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Black Spot on Dog's Skin - What Is It?

Written by: Dr. Athena Gaffud



Time to read 8 min

Have you ever noticed black spots on your dog's skin and wondered what they are?

We will explore the causes, symptoms, diagnosis, and treatment options for black spots in a dog's skin. From hyperpigmentation to allergic reactions, we will delve into the various factors that contribute to the appearance of these dark patches.

What Is a Black Spot in a Dog's Skin?

Black Spot on Dog

A black spot on a dog's skin is a localized area of hyperpigmentation that appears darker than the surrounding skin due to increased melanin production (Sissons, B. & Aremu, B., 2023). These spots vary in size and shape and may be accompanied by other symptoms such as hair loss or itchiness.

Black spots is caused by a variety of factors, including skin infections, allergies, hormonal imbalances, or even genetic predisposition. These spots are commonly found on the abdomen, back, and legs of the dog. It is important to monitor these spots for any changes in size, color, or texture, as they could indicate an underlying health issue.

What Are the Common Causes of Black Spots in a Dog's Skin?


Black spots in a dog's skin have various causes.

  • Hyperpigmentation

  • Allergic reactions

  • Infections

  • Hormonal imbalances

  • Genetic predispositions

Understanding these underlying factors is crucial in determining the appropriate treatment for the condition.

Hyperpigmentation , one of the primary causes of black spots in a dog's skin, occurs due to an excess production of melanin.

This results in dark patches on the skin, often appearing more prominently in certain breeds with higher melanin levels.

Allergic reactions , on the other hand, can lead to black spots through skin irritation and inflammation triggered by contact with allergens such as certain foods, chemicals, or environmental factors.


Infections , whether bacterial, fungal, or parasitic, manifest as black spots when the skin's natural defense mechanisms are compromised, allowing pathogens to thrive and cause discoloration.

Hormonal imbalances , such as those related to thyroid dysfunction or Cushing's disease, can impact melanin production and distribution, contributing to the formation of black spots. Read about “Navigating Cushing's Disease: How CBD Oil Can Benefit Dogs in the Battle”.

Genetic predispositions play a significant role in determining a dog's susceptibility to developing black spots, as certain breeds are genetically prone to skin pigmentation irregularities. 

Hyperpigmentation syndromes are categorized based on the main defect affecting melanogenesis, with novel genes and key players playing a crucial role in developing safer and more efficient treatments,” (Speeckaert, R., et al., 2014).

What Are the Symptoms of Hyperpigmentation in a Dog's Skin?

dog hair loss

Symptoms of hyperpigmentation (also known as acanthosis nigricans) are listed below:

  • Dark Spots or Patches on the Skin

  • Itchiness or Irritation

  • Hair Loss

  • Redness or Inflammation

Various triggers include hormonal imbalances, environmental allergens, insect bites, or skin parasites like mites or fleas. Skin inflammation and itchiness are uncomfortable for the dog and lead to scratching, which worsens the condition. Early diagnosis is crucial to prevent any underlying issues from escalating. Read about “Powerful Home Remedies to Eliminate Dog Ear Mites”.

How Is Hyperpigmentation in a Dog's Skin Diagnosed?

  • Physical Examination

  • Skin Scraping

  • Biopsy

Diagnosing hyperpigmentation in a dog's skin typically involves a thorough physical examination by a veterinarian, followed by additional tests such as skin scraping or biopsy to determine the underlying cause of the skin issue.

During the physical examination, the vet carefully inspects the affected area for any signs of infection, inflammation, or other abnormalities. Skin tests like scrapings help identify external parasites or fungal infections while biopsies provide a closer look at the tissues to pinpoint underlying issues. These procedures are crucial as they reveal the nature and severity of the condition, guiding the treatment plan for the skin condition effectively. A comprehensive approach ensures accurate diagnosis and tailored care for the pet's well-being.

What Is the Treatment for Hyperpigmentation in a Dog's Skin?

Treating black spots on a dog's skin involves a multifaceted approach that includes topical medications, oral treatments, dietary modifications, and specialized products.

Topical Medications

topical cream

Topical medications such as antifungal creams or corticosteroids are commonly used to treat black spots in a dog's skin caused by infections or inflammatory conditions. These medications help alleviate symptoms and promote skin healing.

Antifungal creams are particularly effective in combatting fungal infections that may lead to black spots on a dog's skin. When applied topically, these creams target the source of the infection, helping to clear up the dark spots and restore the skin's health.

On the other hand, corticosteroids are commonly used to reduce inflammation associated with skin conditions, thereby diminishing the appearance of black spots. Follow the veterinarian's instructions for applying these topical medications to ensure proper dosage and frequency.

Oral Medications

dog given pills

Oral medications such as antibiotics or antihistamines are prescribed to address underlying infections or allergic reactions contributing to black spots in a dog's skin. These medications target systemic issues and support the skin's recovery.

Antibiotics are commonly utilized to combat bacterial infections that manifest as black spots on a dog's skin. Depending on the severity of the infection, veterinarians recommend a specific antibiotic course and dosage.

Antihistamines are ideal for addressing allergic reactions that could be causing the black spots. They work by blocking histamine receptors in the body, which helps alleviate itching and inflammation.

Follow the prescribed dosage instructions diligently to ensure the effectiveness of the treatment and minimize potential side effects. Always inform your veterinarian about any other medications or supplements your dog is taking to avoid any possible drug interactions.

Dietary Changes

Owner Feeding  Dog at Home

Dietary changes play a significant role in managing black spots in a dog's skin, especially when related to food allergies or nutritional deficiencies. Tailoring the dog's diet to support skin health helps alleviate skin issues.

Common dietary triggers that can contribute to black spots on a dog's skin include grains like wheat, corn, or soy, and certain proteins such as beef or chicken. These ingredients may be harder for some dogs to digest, leading to skin irritation and the development of black spots.

Omega-3 fatty acids are essential nutrients that help promote healthy skin and a shiny coat for dogs. Foods rich in omega-3s, like salmon, flaxseed, and fish oil supplements, provide vital support for skin wellness and reduce the appearance of black spots.


CBD Oil is a natural treatment option that helps alleviate skin issues and promote overall wellness in dogs with black spots. Its holistic properties make it a popular choice for pet owners seeking alternative remedies.

One of the key benefits of CBD Oil such as Happy-Furever Oil lies in its anti-inflammatory and anti-oxidative properties, which aid in reducing inflammation associated with black spots and supporting skin health.

The full-spectrum nature of this CBD oil ensures that dogs benefit from the entourage effect, where the combination of cannabinoids, terpenes, and other compounds work synergistically to enhance the oil's effectiveness. Read “What’s the Entourage Effect Known in CBD Oil For Dogs?”.

Consult a veterinarian to determine the appropriate dosage and monitor any potential interactions with existing medications when considering integrating this oil into a pet's wellness routine.

Holistic Chews

Holistic Chews are preventative treatments that support skin health and overall well-being in dogs prone to black spots. These chews are enriched with vitamins and nutrients that promote skin regeneration and immune function. Super Health Vitality™ Chews contain ashwagandha, turmeric curcumin, and ginger. By incorporating these chews into a dog's daily routine, pet parents can effectively reduce the occurrence of black spots and enhance the natural glow of their skin. The carefully selected blend of ingredients in Super Health Vitality™ Chews works synergistically to combat inflammation, improve collagen production, and keep the skin hydrated, ultimately leading to a healthier and shinier coat.

Grass-fed Beef Organ Supplement

Grass-fed beef organ meats offer a range of potential benefits due to their nutrient density and quality. Organ meats are some of the most nutrient-dense foods available, containing high levels of vitamins, minerals, and essential nutrients. Grass-fed organ meat supplements like Primal-Vitality Beef Organ Complex are particularly rich in nutrients like vitamin B12, vitamin A, iron, zinc, and selenium which support skin health. The nutrients in grass-fed organ meats are often more bioavailable, meaning they are more easily absorbed and utilized by the body.

Frequently Asked Questions

What is a black spot in a dog's skin?

A black spot in a dog's skin is a small, darkened area on the surface of the skin that can appear on any part of the body. It is usually caused by an excess of melanin, the pigment that gives color to the skin and hair.

What are the possible causes of a black spot in a dog's skin?

There are several possible causes of a black spot in a dog's skin, including allergies, bacterial or fungal infections, hormonal imbalances, and genetics. It is important to consult a veterinarian for proper diagnosis and treatment.

What are the characteristics of a black spot in a dog's skin?

A black spot in a dog's skin may appear as a small, raised bump or a flat discoloration. It may also be accompanied by itching, redness, or hair loss in the affected area. If you notice any of these symptoms, it is best to have your dog examined by a veterinarian.

How is a black spot in a dog's skin diagnosed?

A veterinarian will perform a physical examination of the affected area and may also recommend further tests, such as skin scrapings, cultures, or blood work, to determine the underlying cause of the black spot.

What are the treatment options for a black spot in a dog's skin?

Treatment for a black spot on a dog's skin will depend on the underlying cause. It may include topical or oral medications, dietary changes, or supplements such as CBD Full-Spectrum Happy-Furever Oil, Super Health Vitality™ Chews, or Primal-Vitality Beef Organ Complex.

Can I prevent my dog from getting black spots on their skin?

While some causes of black spots cannot be prevented, you can help keep your dog's skin healthy by maintaining a balanced diet, providing regular grooming, and avoiding exposure to potential allergens. Regular check-ups with a veterinarian can also help catch any potential issues early on.
Dr. Athena Gaffud, DVM

Author: Dr. Athena Gaffud

Dr. Athena is a seasoned, board-certified veterinarian with comprehensive expertise in general practice, veterinary medicine, laboratory operations, and veterinary writing. She is passionate about animals and holistic health. 

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