My Dog Is Losing Hair on Their Nose, What's Wrong? (Vet Answer)

7 Reasons Your Dog May Be Losing Hair on Their Nose (And What to Do About It)

As a devoted dog parent, you likely pay close attention to any changes in your pup‘s appearance or behavior. So if you‘ve recently noticed some thinning fur or bald patches on your dog‘s nose, it‘s only natural to feel concerned. Hair loss (alopecia) on a dog‘s muzzle can occur for a variety of reasons, some relatively harmless and others more serious. In this article, we‘ll explore the most common causes of nasal hair loss in dogs and what you should do if you spot this symptom in your own furry friend.

First, it‘s important to understand that a dog‘s nose itself (the nasal planum) is normally hairless. The bridge of the muzzle and the sides of the nose, however, should be covered in fur in most breeds, with the exception of naturally hairless dogs. Alopecia on the nose will typically affect the top and sides of the snout rather than the leathery nasal planum. You may also notice other symptoms accompanying the hair loss, such as:

• Inflammation or redness of the skin
• Crusting, peeling or excessive dryness
• Areas of depigmentation (lightening of the skin)
• Pustules or bleeding sores
• Itchiness or pain

However, in some cases, the hair loss may occur without any other obvious signs of irritation. Even if your dog doesn‘t seem bothered by their thinning nose fur, it‘s still best to get to the bottom of the issue. Left untreated, certain underlying causes of nasal alopecia can progress and seriously impact your pup‘s comfort and health.

So what exactly leads a dog to develop bald spots on their snout? Here are the top 7 reasons you may discover hair loss on your dog‘s nose:

1. Friction and Trauma
   One of the most innocuous causes of nasal hair loss is simple friction. Dogs who frequently rub their faces and noses against rough surfaces like carpeting, wooden decks, wire fences or crate bars can gradually thin out the delicate fur on their muzzles. Short-coated breeds and dogs with already sparse facial hair may be especially prone to friction-related hair loss.

In most cases, this type of alopecia doesn‘t indicate an underlying health problem. However, it‘s still important to identify and correct the behavior to prevent your pup from rubbing their nose raw. Try to redirect your dog if you notice them grinding their snout into abrasive surfaces. Providing plenty of engaging toys and puzzles can help keep curious noses occupied. If your pup is prone to sticking their muzzle through fences or crates, you may need to block off access or consider an alternative confinement method.

2. Pemphigus Foliaceus
   Pemphigus foliaceus is the most common autoimmune skin disorder in dogs. It occurs when the immune system mistakenly attacks the connections between skin cells, causing the outer layer of skin to peel away. Pemphigus foliaceus often targets the bridge of the nose, as well as the face, ears, footpads and toenails. Affected dogs typically develop hair loss, pustules, ulcers, crusts and depigmentation on these areas.

While any dog can develop pemphigus, certain breeds are predisposed, including:

• Akitas
• Chow Chows
• Collies
• Doberman Pinschers
• Dachshunds
• English Cocker Spaniels
• Shar-Peis

Diagnosing pemphigus foliaceus requires a skin biopsy reviewed by a veterinary pathologist. Treatment involves immunosuppressive drugs to halt the self-destructive immune response. Antibiotics and medicated shampoos or creams may also be prescribed to combat secondary bacterial infections. With aggressive treatment, pemphigus is often manageable, but lifelong medication may be necessary to keep the condition under control.

3. Discoid Lupus Erythematosus
   Discoid lupus erythematosus (DLE), also known as "Collie nose", is another autoimmune disorder that frequently affects the face and nose of dogs. Despite what the name suggests, DLE can impact many breeds beyond Collies, including German Shepherds, Siberian Huskies, Brittanys and Shetland Sheepdogs.

With DLE, the immune system attacks the skin, especially areas that receive a lot of sun exposure. In addition to hair loss on the bridge of the nose, dogs with DLE often develop depigmentation, redness, scaling, ulcers and crusting on their nasal planum. While DLE is a lifelong condition, it‘s considered relatively benign and is usually not associated with more serious systemic lupus erythematosus in dogs.

Treatment for discoid lupus focuses on reducing inflammation and suppressing the abnormal immune response with oral vitamin E, fatty acids, corticosteroids and other immunomodulating drugs. Managing the condition also requires minimizing sun exposure with dog-safe sunscreen, UV-blocking clothing or keeping your dog indoors during peak sunlight hours. With proper treatment and sun protection, most dogs with DLE can enjoy a normal quality of life.

4. Nasal Hyperkeratosis
   Hyperkeratosis refers to a thickening of the outer layer of skin due to excessive keratin production. In dogs, there are two main forms of nasal hyperkeratosis:

• Hereditary nasal parakeratosis of Labrador Retrievers is an inherited condition causing the nasal planum to become dry, rough, and cracked, often accompanied by hair loss on the muzzle. Affected Labs usually show signs by 6-12 months old. While this condition is not curable, it can often be managed with regular application of moisturizers or petroleum jelly to soften the nose.

• Nasodigital hyperkeratosis is another inherited disorder that leads to thickened, crusty skin on the nose and footpads. It‘s most commonly seen in Cocker Spaniels but can also affect Basset Hounds, Bulldogs and Bedlington Terriers. Treatment typically involves surgically trimming away the excess keratin and applying keratolytic agents to prevent regrowth.

5. Mucocutaneous Pyoderma
   Mucocutaneous pyoderma is a bacterial skin infection that targets the boundaries between the haired muzzle and the smooth nasal planum. It often causes hair loss, crusting, ulcers and pustules on both sides of the nose. This type of pyoderma frequently develops as a secondary infection in dogs with allergies, hypothyroidism or Cushing‘s disease.

Diagnosing mucocutaneous pyoderma requires skin cytology (examining skin cells under a microscope) and/or a bacterial culture. Treatment involves a course of oral antibiotics, often for 8 weeks or longer. Identifying and managing any underlying allergies or hormonal imbalances is also critical for preventing the infection from recurring.

6. Demodicosis
   Demodicosis, also called "demodex" or "red mange", is an inflammatory skin condition caused by an overgrowth of Demodex mites living in the hair follicles. While a small number of these mites are normal inhabitants of canine skin, an overabundance can lead to hair loss, redness, scaling and secondary bacterial infections.

Localized demodicosis, which typically affects the face and muzzle of young dogs, often resolves on its own. However, generalized demodicosis involving larger areas of a dog‘s body usually requires treatment with oral or topical anti-parasitic medications and antibiotics. Some breeds, like Bulldogs, Pugs, Shar-Peis, Boston Terriers and Pit Bulls, are more prone to developing severe demodex.

7. Fungal Infections
   Fungal infections of the nose and muzzle can be superficial or deep. Superficial infections typically cause hair loss, crusting and depigmentation and respond well to oral anti-fungal drugs. Deep fungal infections, on the other hand, can invade the nasal passages, sinuses and even spread to the lungs and other organs.

Two particularly concerning fungal diseases that can manifest with nasal symptoms are:

• Aspergillosis: This infection caused by the Aspergillus fungus often triggers nasal discharge, sneezing, nosebleeds and ulcerations on the nasal planum, potentially accompanied by hair loss on the muzzle. It most commonly impacts young to middle-aged dogs, especially Sighthounds and Retrievers. Treatment involves oral anti-fungal drugs, but some severe cases may require surgical debridement of the sinuses.

• Cryptococcosis: This invasive fungal infection can affect the nasal cavity, eyes, central nervous system and other tissues. The most common signs are nasal discharge, sneezing, nose bleeds, skin nodules and swollen lymph nodes. Cryptococcosis is most common in dogs and cats, but humans with weakened immune systems can also get infected. Treatment requires long-term anti-fungal drugs and the prognosis is guarded.

When to See Your Vet
As you can see, hair loss on a dog‘s nose can be a sign of many different conditions, some very serious. Therefore, if you notice any bare patches, crusty spots or sores on your pup‘s snout, it‘s best to get them checked out by your veterinarian right away. Quick diagnosis and treatment can make a huge difference in your dog‘s comfort and long-term prognosis.

To determine the cause of nasal hair loss, your vet will likely recommend some combination of the following:

• A thorough physical exam
• Skin scrapings/cytology to check for mites, bacteria and yeast
• Fungal cultures
• Allergy testing
• Hormonal tests to look for underlying endocrine disorders
• Blood work and urinalysis to evaluate overall health
• Skin biopsies for certain conditions

Depending on the diagnosis, treatment may include:

• Anti-parasitic medications for conditions like demodicosis
• Antibiotics for bacterial infections
• Anti-fungal drugs for yeast and fungal diseases
• Immunosuppressants like steroids or cyclosporine for autoimmune disorders
• Medicated shampoos or creams
• Surgical removal of damaged skin
• Strategies to prevent self-trauma from rubbing or scratching
• A food elimination trial to identify potential food allergies
• Desensitization therapy for environmental allergies

Caring for Your Dog‘s Nose
No matter what‘s causing your dog‘s nasal hair loss, there are some steps you can take to protect that sensitive snout:

• Apply a dog-safe sunscreen before spending time outdoors, especially for dogs with depigmented or pink noses. Look for a product with non-zinc oxide and an SPF of at least 30.

• Avoid letting your dog rub their nose on rough surfaces like concrete or rough play with other dogs that could lead to snout injuries.

• Keep your pup‘s face clean and free of crusty build-up. You can gently wipe their muzzle with a damp cloth or use a soothing balm to keep their nose soft and moisturized (with your vet‘s approval).

• Use a humidifier indoors if you live in a dry climate. Low humidity can dry out your dog‘s nose and make certain conditions like hyperkeratosis worse.

• Ask your vet about omega-3 fatty acid supplements. These healthy oils can support your dog‘s skin and coat health and reduce inflammation associated with many skin disorders.

With a little extra TLC and veterinary guidance, you can help get your dog‘s nose back to its furry, healthy self. Remember, any sudden change in your dog‘s appearance or behavior warrants a trip to the vet, so don‘t hesitate to get your pup the care they need. A proactive approach is always the best way to keep that precious snout in tip-top shape!