Hair loss in cats isn't just a cosmetic issue—bald spots can be a sign of underlying health problems. Whether it's allergies, parasites, or stress, there are many reasons why your cat might suddenly start losing its fur.

Possible causes of hair loss in cats

1. Parasites such as fleas and mites

Fleas, lice, or mites cause severe itching, which can lead to excessive scratching and licking and, as a result, bald patches —often on the neck, belly, or tail.

2. Allergies (food, environmental, flea bites)

Cats may be sensitive to certain proteins in their food, dust mites, pollen, or flea saliva. Typical symptoms include itchy, inflamed patches of skin and simultaneous hair loss.

3. Skin fungus (dermatophytosis)

Skin fungi are highly contagious and manifest as round, bald patches with flaking. Young or immunocompromised cats are particularly susceptible.

4. Hormonal disorders

Problems with the thyroid or adrenal glands can disrupt the natural shedding cycle and lead to diffuse hair loss —often without itching.

5. Stress or boredom

Psychological stress (e.g., caused by moving, new pets, or a lack of stimulation) can lead to excessive licking (psychogenic lick alopecia) —especially on the belly and hind legs.

When should you take your pet to the vet?

A visit to the veterinarian is strongly recommended if:

• the bald spots are getting bigger or spreading

• the cat is scratching or licking itself intensely

• the skin appears red, flaky, or inflamed

• in addition, diarrhea, vomiting, or behavioral changes may occur

Coat Care & Skin Protection: What You Can Do at Home

• Brush regularly to remove dead hair and stimulate blood circulation

• Make sure to eat a high-quality diet rich in essential fatty acids (such as omega-3 and omega-6)

• Identify and minimize stress factors

• Create a low-allergen environment (e.g., reduce household dust)

Doderm – for healthy, happy cats

Doderm naturally supports your cat’s skin. The milk antibodies it contains help maintain the balance of the skin’s flora, soothe irritation, and strengthen the skin barrier. The result: less itching, faster healing, and greater comfort.
This way, your cat can do what it loves best—purr contentedly.