Scabs on your cat: why they appear on the neck, back or face
You run your hand along your cat’s back and feel little bumps like grit, or you see scabs on its neck and face. In cats this has its own name, miliary dermatitis, and its most common cause is no mystery: fleas. But it is not the only one, and some scabs, especially on white cats, mean a trip to the vet without delay.
What they look like and where they appear
Scabs on a cat come in several forms. The most typical is dozens of tiny scabs, like millet seeds, that you feel more than see, spread along the back, the base of the tail and the neck: this is miliary dermatitis, a reaction pattern of feline skin rather than a specific disease. There are also larger scabs on the head, neck and in front of the ears, often with scratch wounds; scabs on the bridge of the nose and the ears; and scabs or ulcers on the lips or skin. Their location, shape and whether they itch help the vet narrow things down, so look carefully before you go, or take a photo.
Cause number one: fleas
Flea allergy dermatitis is the most common skin disease in cats. A single bite in an allergic cat is enough to set off days of itching and scabs, which is why owners often say “but it does not have fleas”: the cat removes them while grooming and they are hardly ever seen. What you can see are black specks in the coat that turn red when dropped onto damp paper: flea droppings. Even a cat that never goes out can get fleas brought in on clothes, on another animal or from the stairwell. The diagnosis is often confirmed by treating every animal in the house properly for several months and seeing whether it clears up.
Food and environmental allergies
Once fleas have been ruled out with rigorous treatment, the next suspects are food allergy and feline atopic syndrome, an allergy to dust mites, pollens or other environmental allergens. Both cause scabs and itching mainly on the head, face and neck, and sometimes bald patches from over-grooming on the belly or flanks. Food allergy is diagnosed with a strict elimination diet for eight weeks, using hydrolysed protein or a protein the cat has never eaten, with no treats or other foods. Atopy is diagnosed by ruling out everything else. Neither can be cured, but both can be well controlled with diet, veterinary medication and sometimes immunotherapy.
Mosquitoes, sun and white cats
Some cats are allergic to mosquito bites and develop scabs and sores on the bridge of the nose and the edges of the ears, exactly where there is least fur, especially in summer and in cats that go out at dusk. In white cats or those with pink skin on the ears and nose, the sun causes solar dermatitis: redness, scaling and scabs on the ear tips and nose that get worse every summer. Over the years, those lesions can turn into squamous cell carcinoma, a skin cancer. A scab that will not heal on a white ear is not just another wound: take the cat to the vet to have it assessed, and the sooner the better.
Other causes: fungi, mites, wounds
Ringworm, caused by fungi, produces round bald patches with scaling and scabs, often on the head and legs, and is contagious to people. Notoedric mange, caused by the mite Notoedres cati, produces very itchy grey crusts on the ear edges and face, and is seen more in colony cats. Ear mites can cause scabs around the ears from scratching. Fight wounds and healing abscesses leave scabs. The eosinophilic granuloma complex produces plaques, ulcers on the upper lip or granulomas on the chin. And pemphigus and other immune-mediated diseases, although rare, cause crusting on the face, ears and around the claws.
When it is more urgent
See the vet soon if scabs appear on the edges of the ears or the nose of a white cat and do not heal, if there are open wounds that will not close, if they bleed or grow, if the itching is so intense that the cat injures itself, if there are round bald patches (possible ringworm, especially if there are children at home), or if the cat is subdued, feverish or not eating. Intense itching of the head with wounds in a cat living with other cats that are also scratching may be a contagious mange. None of these situations is usually a middle-of-the-night emergency, but it is not wise to let weeks go by either.
What the vet will do
A thorough history (whether the cat goes out, what parasite treatment it gets, whether there are other animals, when it started, whether it improves in winter) and an examination of the skin. Then simple tests: a flea comb, sticky tape and skin scrapes for mites, cytology to see whether there is a bacterial or yeast infection and which cells predominate, a Wood’s lamp and a fungal culture or PCR. If no cause is found, the next step is a treatment trial with comprehensive parasite control, then an elimination diet, and if the lesions are atypical or a tumour or immune-mediated disease is suspected, a skin biopsy under anaesthetic or sedation.
What it costs in Spain in 2026
As a guide: general dermatology consultation, €40 to €70; with a veterinary dermatologist, €70 to €130; cytology and skin scrapes, €20 to €60; fungal culture or PCR, €30 to €80; flea treatment for all the animals for three months, €40 to €150 depending on how many there are; hydrolysed diet for the elimination trial, €40 to €80 a month; skin biopsy with laboratory work, €150 to €350. Surgery for carcinoma of the ears (partial removal of the ear flap) usually costs €300 to €800, and is much simpler and has a better outlook if done early.
What not to do
Do not pick off the scabs or rub them with surgical spirit, hydrogen peroxide or strong disinfectants. Do not use creams containing corticosteroids, antibiotics or antifungals from your medicine cabinet: cats lick everything, and they can also make ringworm worse or mask the diagnosis. Do not apply essential oils, which are toxic to cats. Never use a dog spot-on or collar, because many contain permethrin, which is highly toxic to cats. And do not conclude that the flea treatment does not work without having applied it properly, every month, to every animal in the house and for several months running: that is the most common mistake with flea allergy dermatitis.
Prevention
Year-round veterinary external parasite control, in winter too and for cats that never go out as well, applied to every animal in the house at the same time, plus frequent vacuuming of rugs, sofas and beds, because most of the flea population lives in the environment, not on the cat. In white cats or those with pink ears, avoid direct sun in the middle of the day, use UV-filtering film on windows if they sunbathe behind glass and, if the vet advises it, a cat-safe sunscreen. Insect screens in summer for cats allergic to mosquitoes. And check its skin when you brush it: a small scab is much easier to treat.
Tiny, gritty scabs on the neck and back are nearly always flea allergy, even if you see no fleas. Treat every animal in the house for months. Scabs that will not heal on the ears and nose of a white cat may be skin cancer: have them checked early.
Educational content from Michipedia, translated from the Spanish original. It does not replace the advice of a vet or a feline behaviour specialist. Every cat is an individual.