
Acanthosis nigricans is a skin condition that affects many breeds of dogs, but it's particularly common in Dachshunds. This condition causes dark, velvety patches to form in skin folds and creases.
The exact cause of acanthosis nigricans in Dachshunds is still unclear, but genetics and obesity are thought to play a role. Some Dachshunds may develop the condition due to inherited traits.
Dachshunds with acanthosis nigricans may also have other health issues, such as insulin resistance or Cushing's disease. These conditions can make the skin condition worse and require separate treatment.
If you suspect your Dachshund has acanthosis nigricans, it's essential to consult a veterinarian for an accurate diagnosis and care plan.
Clinical Signs and Symptoms
As a dog owner, it's essential to be aware of the clinical signs and symptoms of acanthosis nigricans in Dachshunds.
Bilateral axillary or inguinal hyperpigmentation and lichenification are common clinical signs of the disease.
These lesions often have erythematous edges, which can be due to secondary pyoderma.
Seborrhea may also occur as a secondary condition, leading to further skin issues.
Pruritus, or itching, can be variable and is often caused by either the underlying disease or a secondary infection.
Lesions can spread to various areas of the body, including the ventral neck, groin, abdomen, perineum, hocks, periocular area, and pinnae.
As the disease progresses, alopecia, or hair loss, may become evident.
The affected skin can become thickened and have a rough or leathery quality, with a darker pigment ranging from brown to black.
These areas are often hairless and may show signs of secondary infections, leading to itching, redness, discomfort, and a bad odor.
For your interest: Cushing's Disease in Dachshunds
Recognizing and Diagnosing
Recognizing the signs of acanthosis nigricans in your dachshund is crucial for early detection and treatment. Regular skin checks can help you catch the condition before it becomes severe.
Visible blackening or darkening of the skin in certain areas, such as the neck, armpits, or groin, are common indicators of the condition. Inflamed skin, loss of hair, thickening and toughening of the skin surface, and pruritus or itchy patches are also potential signs.
If you notice any of these symptoms, it's essential to consult your veterinarian. They will conduct a physical examination and potentially take a skin biopsy to confirm the diagnosis. Blood tests and allergy testing may also be necessary to identify underlying hormonal imbalances or allergenic triggers.
Here are some key signs to look out for:
When to Recognize Danger
Recognizing danger in Acanthosis Nigricans is crucial, especially when it's caused by disorders of the endocrine system. If left untreated, hypothyroidism and hyperadrenocorticism can be very dangerous.
Chronic skin infections and allergies may be frustrating, but they're not typically severe. However, when they're linked to endocrine disorders, the situation becomes more critical.
It's essential to consult your veterinarian if you notice changes in your dog's skin pigment or thickness. This is true regardless of their age and overall health.
Don't wait for symptoms to worsen - seek professional advice at the first sign of trouble.
Recommended read: Fungal Skin Disorders in Dogs
Diagnosing the Condition

Diagnosing the condition can be a bit of a process, but your vet will need to conduct a physical examination to make a definitive diagnosis of acanthosis nigricans in your dog.
A skin biopsy may also be taken to confirm the diagnosis. Your vet will also need to run a range of additional tests to identify the underlying cause of the condition.
Blood tests may be used to identify any underlying hormonal imbalance, and allergy testing may be performed to identify the presence of a certain allergenic trigger that may be causing the condition.
The underlying cause of the condition will determine the best course of treatment. For primary acanthosis nigricans, the darkening of the skin in the affected areas cannot be reversed, but the condition can be kept under control and kept from worsening.
A fresh viewpoint: Skin Disorders in Dogs Hair Loss
Treatment and Prevention
Managing acanthosis nigricans in dachshunds requires a multi-faceted approach.
The key to resolving the condition is often treating obesity or underlying allergenic conditions.

Conditioning baths and supplements like vitamin E and essential fatty acids can also help keep the skin in good condition.
Topical treatments like Topagen ointment may be prescribed by your vet, but it may not provide long-lasting results.
Oral antibiotics can help control bacterial infections that may be contributing to inflammation.
A pill a day, such as Cytobin, can help control the condition by addressing thyroid issues.
Testing the thyroid is essential to determine if it's involved in the condition.
Understanding the Condition
Acanthosis nigricans in dachshunds is a skin condition that's often misunderstood. It's a thickening and blackening of the skin, usually in the armpit area, although it can also appear between the back legs.
The condition is most common in dachshunds, but it can occasionally affect other breeds, such as basset hounds. It's not just a cosmetic issue, as it can be uncomfortable and painful for your dog.
The symptoms can be quite noticeable, including rough and black skin, red and inflamed areas, and even hair loss in the affected areas. In some cases, the skin may become thick and tough, and it can even be prone to secondary complications like bacterial or fungal infections.

Here are the main indications of acanthosis nigricans in your dog:
- Clearly visible blackening or darkening of the skin in certain areas.
- Inflamed skin in the affected area.
- Loss of hair in the affected areas.
- Thickening and toughening of the surface of the skin.
- Pruritus or itchy patches.
- Seborrheic patches, which may be flaky or irritable.
- Additional secondary complications, such as bacterial or fungal infections.
Dachshund Acanthosis Frequency
Primary Acanthosis Nigricans is most commonly seen in the Dachshund breed.
It's a rare disorder, even within this breed.
Secondary Acanthosis Nigricans is much more commonly seen and can affect any breed.
Due to a Dachshund's predisposition to certain underlying conditions, it's not surprising that they're on the list of breeds this is more often seen in.
Causes of Dark Skin Folds in Dogs
Acanthosis nigricans is a condition that causes dark skin folds in dogs, and it's essential to understand its causes to provide the best care for your furry friend.
The condition can be genetic and hereditary, passing on from parent dogs to their offspring, also known as genetic or primary acanthosis nigricans. This form of the condition tends to occur in dogs that are going to be affected by it prior to the dog reaching the age of one year old.
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Dachshunds and dogs with some Dachshund ancestry are the most likely breed to be afflicted with the primary or hereditary form of the condition. This is because the Dachshund breed is particularly prone to this condition.
The skin in the affected areas will become thickened and darker, and will be accompanied by seborrhoea, or scaly, flaky skin.
Frequently Asked Questions
What breed of dog has acanthosis nigricans?
Dachshunds are most commonly affected by acanthosis nigricans, a skin condition characterized by hyperpigmentation, lichenification, and alopecia
Why is my Dachshunds belly getting darker?
Dachshunds, like many dogs, can develop darker skin patches as they age, particularly on areas like the belly, due to natural skin pigmentation changes
Sources
- https://en.wikivet.net/Acanthosis_Nigricans
- https://www.dachworld.com/acanthosis-nigricans-in-dogs/
- https://www.pets4homes.co.uk/pet-advice/black-patches-on-the-skin-acanthosis-nigricans-in-dogs.html
- http://www.petmed.net.au/acanthosis-nigricans-in-dogs/
- https://www.chicagotribune.com/1987/09/20/dachshunds-skin-disease-is-controllable/
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