Hair loss around a dog’s eyes is one of the most common dermatological complaints veterinarians see, and in most cases it points to one of a handful of treatable conditions. The area around the eyes is particularly thin-skinned and vulnerable, making it one of the first places to show signs of mites, allergies, infections, or inflammation. Figuring out the cause usually requires a vet visit, but understanding the possibilities can help you recognize what you’re dealing with.
Demodectic Mange: The Most Common Cause in Young Dogs
If your dog is under 18 months old and losing hair around her eyes, demodectic mange is the leading suspect. Demodex mites live naturally on most dogs in small numbers, but puppies and adolescent dogs with still-developing immune systems sometimes can’t keep the mite population in check. When the mites multiply, hair loss begins on the face, especially around the eyes. The patches are usually not itchy at first, which distinguishes them from many other causes.
Certain breeds are significantly more prone to this condition. A UK study found that English Bulldogs had more than 11 times the odds of developing juvenile demodicosis compared to mixed-breed dogs. Staffordshire Bull Terriers, Chinese Shar-Peis, Dogues de Bordeaux, Pugs, French Bulldogs, and Boxers also showed elevated risk. Pugs and Shar-Peis carry increased odds not just in youth but also later in life, past age four.
The good news: localized demodectic mange (a few small patches, typically on the face) often resolves on its own as a puppy’s immune system matures. When treatment is needed, hair regrowth is encouraging. In clinical trials, the majority of dogs with generalized demodicosis had over 90% hair regrowth by 56 to 84 days after starting treatment.
Allergies and Self-Trauma
Environmental allergies (atopic dermatitis) are another frequent cause. Dogs with allergies to pollen, dust mites, or mold often develop intense itching around the face and eyes. The hair loss itself isn’t caused directly by the allergen. Instead, the dog rubs, scratches, or paws at her face to relieve the itch, physically damaging the hair follicles and breaking off hair. You’ll typically see redness, irritation, and sometimes watery eyes alongside the thinning fur.
Food allergies can produce similar facial itching and hair loss, though they’re less common than environmental triggers. If the hair loss coincides with a diet change or appears alongside ear infections and digestive issues, food sensitivity is worth investigating. Flea bite allergies can also cause facial scratching in sensitive dogs, particularly if the bites trigger a widespread inflammatory response.
Ringworm and Other Fungal Infections
Despite the name, ringworm is a fungal infection, not a worm. It frequently targets the face, legs, and tail. The telltale signs are circular patches of hair loss with redness, scaling, and crusty edges. In dogs, the fungal species responsible in roughly 80% to 97% of cases produces lesions that can look scaly and irregularly shaped rather than the neat ring people expect.
Ringworm is contagious to other pets and to humans, which makes it important to identify quickly. If you notice crusty, flaky patches of hair loss around your dog’s eyes that seem to be spreading, isolate her from other animals until a vet can confirm or rule out a fungal cause.
Blepharitis: Inflammation of the Eyelids
Blepharitis is inflammation specifically affecting the eyelids, and it can develop from a surprisingly long list of triggers: bacterial infections, fungal infections, parasites, allergies, trauma, and even blocked oil glands along the eyelid margin. These meibomian glands normally help lubricate the eye, but when one becomes inflamed or blocked (a condition called a chalazion), the eyelid swells and the surrounding skin suffers.
Bacterial staph infections are a particularly common culprit. They can cause localized abscesses on the eyelid or widespread eyelid inflammation, and in some dogs, the immune system overreacts to the bacteria itself, creating an allergic-type response that worsens the swelling. When blepharitis persists, the affected area loses both pigment and hair. You might notice your dog’s eyelids looking puffy, red, or crusty, with thinning fur that gradually worsens.
Hormonal and Systemic Conditions
In middle-aged and older dogs, hair loss that isn’t itchy and doesn’t seem to bother the dog can sometimes signal an underlying hormonal imbalance. Hypothyroidism, the most common hormone disorder in dogs, causes hair loss in about 40% of affected animals. The classic pattern starts on the tail (giving it a “rat tail” look) or around the collar area, and the coat generally becomes thin and dull throughout. Facial changes tend to show up as thickened skin and increased skin folds rather than isolated bald patches around the eyes, so periocular hair loss alone is less likely to point to a thyroid problem.
Cushing’s disease (excess cortisol production) can also thin the coat, but like hypothyroidism, it usually produces widespread changes: a pot-bellied appearance, increased thirst, and symmetrical hair loss across the body. If your dog’s only symptom is hair loss around the eyes with no other systemic signs, a hormonal cause is lower on the list, though still worth checking if the more common possibilities have been ruled out.
How Vets Figure Out the Cause
Your vet will start with a close visual exam of the affected skin, noting whether it’s red, crusty, scaly, or smooth. From there, a few straightforward tests narrow things down quickly. A skin scraping, where a scalpel blade gently collects cells and debris from the surface, is the standard method for detecting Demodex mites. The sample goes onto a slide and under a microscope, where mites are visible if present.
Cytology (examining cells from the skin surface) helps identify bacterial or yeast overgrowth and can reveal signs of fungal infection or immune-mediated disease. For suspected ringworm, a fungal culture provides a definitive answer, though it can take up to two weeks for results. In cases where allergies are the leading theory, your vet may recommend elimination diets or allergy testing to pinpoint specific triggers.
If the hair loss is accompanied by eye redness, cloudiness, discharge, apparent bulging, or any sign of vision change, the priority shifts to evaluating the eye itself. These symptoms suggest a primary eye condition that needs urgent attention, with the hair loss being secondary.
What Recovery Looks Like
Recovery timelines depend entirely on the underlying cause. Localized demodectic mange in a young dog may clear up within a few weeks without treatment, and even generalized cases typically show strong hair regrowth within two to three months of starting therapy. Ringworm usually requires several weeks of antifungal treatment, and you’ll need to decontaminate bedding and shared spaces to prevent reinfection.
Allergy-related hair loss is the most variable. Once the scratching stops (through allergen avoidance, medication, or both), hair grows back relatively quickly. But because allergies are a chronic condition, flare-ups can bring the hair loss back seasonally or when exposure to the trigger recurs. Blepharitis caused by infection resolves with appropriate treatment, though long-standing cases may leave some permanent thinning if the follicles were damaged.
The skin around a dog’s eyes is delicate and heals at its own pace. Even after the underlying problem is resolved, it can take four to eight weeks before the area looks fully normal again. Resist the urge to apply over-the-counter creams or ointments near the eyes without veterinary guidance, since many topical products are not safe for use that close to the cornea.