Noticing your old dog losing hair on the nose can be worrying, particularly when the change appears suddenly or the normally smooth, pigmented surface of the nose begins to look different.
Hair loss around the nose can also become more noticeable because the area is constantly exposed and easy to see.
It is important to pay attention to both the hair loss and the skin underneath it.
Changes such as redness, crusting, scaling, sores, swelling, or changes in the nose itself can provide important information about what your dog may be experiencing.
Old Dog Losing Hair on Nose: Why It Happens
A dog may lose hair on the nose when the skin or hair follicles become irritated, inflamed, infected, or otherwise affected by an underlying skin or immune-related condition.
Hair loss may occur around the bridge of the nose, muzzle, or nearby facial areas and can range from a small patch to more widespread changes.
The appearance of the skin underneath the missing hair is especially useful when assessing the problem.
Some dogs develop itching or irritation, while others have changes in pigmentation, crusting, scaling, or sores without obvious discomfort.
Old Dog Losing Hair on Nose: Symptoms
Depending on the underlying problem, other symptoms may occur at the same time, including:
Thinning hair around the nose or muzzle
Bald patches on the bridge of the nose
Redness or irritation
Crusting or scaling
Changes in nose pigmentation
Itching or face rubbing
Sores or small lesions
Swelling or discharge
Old Dog Losing Hair on Nose: Common Causes
Rubbing or Physical Irritation
Repeated rubbing against carpets, furniture, crates, fences, or other surfaces can cause hair around the nose and muzzle to become worn or broken.
Some dogs rub their faces because of itching, while others simply develop the habit from repeated contact with a surface.
The skin may look mildly irritated, and hair loss may occur exactly where the nose or muzzle repeatedly contacts the surface.
If the rubbing stops and there is no underlying skin disease, the area may gradually recover. Persistent rubbing, however, should prompt investigation into why your dog is doing it.
Read more: Old Dog Losing Hair in Patches and Scabs (Causes and treatment)
Allergies
Allergies can cause itching and inflammation affecting the face and muzzle. A dog may respond by rubbing its nose, scratching its face, or repeatedly licking the affected area, which can contribute to hair loss.
Other signs may include itchy paws, recurrent ear problems, redness, or irritation elsewhere on the body.
Allergies are generally manageable, but ongoing scratching can damage the skin and contribute to secondary infections. Veterinary evaluation can help determine the most appropriate treatment.
Bacterial or Yeast Skin Infection
Skin infections can affect the muzzle and surrounding facial skin and may lead to hair loss. The affected area may become red, flaky, crusty, greasy, or develop an unusual odor.
Dogs may rub or scratch the area because it is uncomfortable.
In some cases, the infection develops after the skin has already been damaged by allergies or repeated irritation.
A veterinarian may need to examine cells from the skin to determine whether bacteria or yeast are contributing to the problem. Treatment depends on what is identified.
Parasites
Certain mites and other external parasites can cause localized hair loss and skin irritation. The face, ears, and muzzle can be affected, depending on the parasite involved.
Some dogs develop significant itching, while others may primarily show bald patches, scaling, crusting, or changes in the skin.
Because many mites cannot be identified simply by looking at the skin, veterinary testing may be necessary. Appropriate treatment depends on the specific parasite.
Ringworm
Ringworm is a fungal infection that can cause areas of hair loss and scaling on the face and other parts of the body. Despite its name, it is not caused by a worm.
Lesions may be circular or irregular and can become crusty or inflamed. Some dogs have relatively little itching.
Ringworm can spread between animals and can sometimes infect people, so suspected cases should be evaluated by a veterinarian rather than treated with random skin products.
Related: Old Dog Losing Hair Around Eyes (Causes and treatment)
Autoimmune or Immune-Mediated Skin Disease
Some immune-mediated skin conditions can affect the nose and muzzle and cause changes in pigmentation, crusting, scaling, or hair loss.
Certain conditions specifically affect the skin around the nose and may cause the normally dark surface to become lighter.
These disorders can look similar to infections or other skin problems, making diagnosis based on appearance alone difficult.
A veterinarian may recommend skin testing or a biopsy when an immune-mediated condition is suspected. Treatment depends on the specific diagnosis.
Sun-Related Skin Damage
The nose and face receive direct exposure to sunlight, and dogs with lightly pigmented skin may be more susceptible to sun-related irritation.
Repeated sun exposure can contribute to changes in pigmentation and skin condition.
Dogs with existing hair loss may have more exposed skin, potentially increasing the importance of protecting the area from excessive sunlight.
If the skin becomes persistently red, crusted, ulcerated, or otherwise abnormal, veterinary examination is important because chronic sun damage can sometimes lead to more significant skin disease.
Other Skin Growths or Disease
Older dogs can develop various skin growths and other dermatological conditions.
A lump, thickened area, persistent sore, or unusual lesion around the nose can sometimes interfere with normal hair growth.
Not every growth is cancerous, but a lesion that changes, grows, bleeds, or fails to heal should be examined.
Veterinary assessment is particularly important when hair loss is concentrated around a specific abnormal area rather than occurring as generalized thinning.
Related: Old Dog Losing Hair (Causes and treatment)
Old Dog Losing Hair on Nose: What to Do
Gently examine your dog’s nose and surrounding muzzle in good lighting. Look for redness, crusting, scaling, sores, swelling, discharge, or changes in pigmentation.
Try to identify whether your dog is rubbing or scratching the area. If possible, reduce access to surfaces that appear to be causing repeated friction.
Keep your dog’s bedding and living area clean, particularly if parasites or an infectious skin condition could be involved.
Avoid sharing grooming equipment with other pets until the cause of the hair loss is known.
Do not apply human creams, essential oils, antifungal medications, steroids, or other products to your dog’s nose unless your veterinarian specifically recommends them.
The nose can be sensitive, and dogs can easily lick topical products.
Avoid attempting to peel away crusts or scrape the affected skin. This can cause additional irritation or injury.
Take photographs of the nose and affected area over several days.
This can help you determine whether the hair loss or skin changes are progressing and can be useful during a veterinary consultation.
When to Call or Visit the Vet
A small area of hair loss caused by mild irritation may improve once the irritation stops, but persistent or progressive changes around the nose should be evaluated.
This is particularly important when the skin itself looks abnormal.
Schedule an appointment if you notice:
Hair loss that continues or spreads
Persistent redness or scaling
Crusting around the nose
Changes in nose pigmentation
Frequent face rubbing
Recurring skin infections
A lump or thickened area
A sore that does not heal
Seek emergency veterinary attention immediately if your dog develops:
Severe facial swelling
Difficulty breathing
Sudden widespread facial swelling or hives
Significant bleeding
Severe pain
Rapid deterioration in overall condition
Extreme weakness or collapse
Old Dog Losing Hair on Nose: Treatment
Veterinary treatment for an old dog losing hair on the nose starts with a thorough examination of the nose, muzzle, skin, hair coat, and affected areas, along with a review of the dog’s medical history and other symptoms.
The veterinarian may recommend skin scrapings, cytology, fungal testing, blood tests, allergy evaluation, or a skin biopsy when appropriate to identify infection, parasites, immune-mediated disease, or other underlying conditions.
Treatment may include prescription medications, parasite control, treatment for bacterial or fungal infections, allergy management, protective skin care, or other targeted therapy based on the diagnosis.
Key Takeaway
Old dog losing hair on the nose can be associated with rubbing, allergies, infections, parasites, immune-mediated skin conditions, sun-related damage, or other skin problems.
The appearance of the skin beneath the missing hair can provide important clues about what is happening.
A small area of hair loss without other abnormalities may be less concerning, but persistent hair loss, crusting, sores, changes in pigmentation, swelling, or a growing lesion should not be ignored.
If the hair loss continues or the skin becomes increasingly abnormal, arrange a veterinary examination.
With the correct diagnosis, your veterinarian can recommend treatment to address the underlying problem and help protect your dog’s skin and nose.