Recognising Skin Problems in Cats
Cats are private creatures who tend to hide discomfort, which means skin problems can progress significantly before an owner notices something is wrong. Because cats spend so much time grooming, the coat often masks what is happening at skin level — hair loss may be attributed to normal shedding, and early skin lesions can be hidden beneath a dense coat for weeks. This guide covers the most common feline skin conditions, how to recognise them, what causes them, and when veterinary attention is needed.
Flea Allergy Dermatitis and Miliary Dermatitis
Flea allergy dermatitis (FAD) is one of the most prevalent skin conditions in cats across Europe. Like dogs, cats can develop a hypersensitivity to proteins in flea saliva, meaning a single bite from a single flea can provoke a significant and prolonged inflammatory reaction in a sensitised cat.
In cats, FAD most commonly presents as miliary dermatitis — a pattern of tiny, crusted papules (bumps) distributed along the back, around the neck, and at the base of the tail. The name comes from the Latin word for millet seeds, which the papules resemble when felt through the coat. Affected cats scratch intensely, over-groom the affected areas, and may develop secondary hair loss and skin thickening in chronic cases.
ESCCAP (the European Scientific Counsel Companion Animal Parasites) recommends year-round flea prevention for all companion cats, not just those showing signs of allergy. In a multi-pet household, all animals must be treated simultaneously, and the home environment — where the majority of the flea life cycle occurs — must also be treated with a household flea spray. Veterinary-prescribed spot-on treatments applied monthly are the most effective preventative measure. EU-available flea treatments, including spot-on options from Frontline and Advantage, can be found on Zooplus alongside household flea sprays suitable for use around pets.
Ringworm (Dermatophytosis)
Despite the name, ringworm is not a worm — it is a fungal infection caused most commonly in cats by Microsporum canis. It is among the most important cat skin conditions for owners to know about because it is zoonotic, meaning it can transmit from cats to humans. Children, elderly people, and immunocompromised individuals are at highest risk of contracting ringworm from an infected cat.
In cats, ringworm typically appears as roughly circular areas of hair loss with scaling or crusting at the margins. The lesions are classically found on the face, ears, and forelimbs. Longhaired breeds such as Persians are disproportionately affected. Some cats — particularly adults with healthy immune systems — can carry ringworm without showing obvious lesions (subclinical carriers), making thorough veterinary screening essential in breeding catteries.
Treatment involves antifungal medication — typically itraconazole or terbinafine orally, combined with twice-weekly antifungal shampoo washes (such as miconazole/chlorhexidine combination shampoos). The home environment must also be decontaminated, as ringworm spores can survive for months. Treatment courses typically last a minimum of 6–8 weeks and should continue until two consecutive negative fungal cultures are obtained.
Atopic Dermatitis in Cats
Atopic dermatitis — an allergic inflammatory skin response to environmental allergens such as dust mites, pollens, and moulds — is less commonly diagnosed in cats than in dogs, but it does occur and is probably under-recognised. In cats, atopy does not always present with the same clear pattern seen in dogs. Instead, it frequently manifests as one of several reaction patterns: miliary dermatitis, over-grooming leading to hair loss (see below), or eosinophilic granuloma complex lesions.
Diagnosis in cats is challenging and typically requires ruling out other causes (parasites, food allergy, infection) before atopy is confirmed. Intradermal testing and serum allergy testing are available through veterinary dermatologists. Management mirrors that in dogs: allergen avoidance where possible, anti-inflammatory medications, and allergen-specific immunotherapy for suitable candidates.
Over-Grooming and Psychogenic Alopecia
Cats are dedicated self-groomers, but excessive grooming — licking, chewing, or pulling at the fur — can result in significant hair loss. The hair loss caused by over-grooming has a distinctive appearance: the remaining hair appears stubble-like and broken rather than shed cleanly at the follicle, and the distribution follows whichever areas the cat can reach most easily — the belly, inner thighs, flanks, and forelegs are most commonly affected.
Over-grooming has both physical and psychological causes, and distinguishing between them requires veterinary assessment:
- Physical causes: Pruritus (itch) from any source — parasites, allergy, or skin infection — is far more likely to cause over-grooming than stress in most cats. This must be excluded thoroughly before a psychological cause is accepted.
- Psychogenic alopecia: Stress-induced over-grooming does occur, most commonly in indoor cats experiencing significant environmental changes — a house move, a new baby, a new pet, or disruption to routine. Affected cats are usually middle-aged, highly strung individuals of certain breeds (Siamese, Abyssinians, and Burmese appear over-represented). Management involves reducing environmental stressors, environmental enrichment, and in some cases, anxiolytic medication prescribed by a vet.
Eosinophilic Granuloma Complex
The eosinophilic granuloma complex (EGC) is not a single disease but a group of skin reaction patterns in cats that share a common underlying mechanism — an overactivation of eosinophils (a type of immune cell) in the skin. The three main lesion types are:
- Indolent (rodent) ulcer: A well-defined, ulcerated lesion on the upper lip, typically painless to the cat despite its concerning appearance
- Eosinophilic plaque: Raised, red, moist, intensely itchy plaques typically on the abdomen and inner thighs
- Eosinophilic granuloma: Linear raised lesions on the thighs or face, or collagenolytic (collagen-dissolving) nodules on the footpads
In many cats, EGC has an identifiable allergic trigger — flea allergy, food allergy, or environmental allergy. Treating the underlying allergy often resolves or significantly reduces the lesions. In cats with no identifiable trigger, corticosteroids (prednisolone) or other immunosuppressive medications are used to manage flare-ups.
Mange in Cats (Notoedric Mange)
Mange in cats is caused by Notoedres cati, a mite related to the Sarcoptes mite that causes sarcoptic mange in dogs. Notoedric mange is relatively rare in the EU compared to other parts of the world, but cases do occur. The mite causes severe, intensely itchy crusting dermatitis beginning on the ears, face, and neck, which can spread across the body if untreated.
Notoedric mange is contagious between cats and can temporarily infest humans (causing self-limiting itching), so prompt treatment is important. Diagnosis is by skin scrape examination under a microscope. Treatment options include selamectin spot-on, ivermectin (in appropriate formulations), or newer isoxazoline-class parasiticides prescribed by a vet.
Feline Chin Acne
Feline chin acne is a common and often underdiagnosed condition presenting as blackheads (comedones), papules, or pustules on the chin and lower lip. Mild cases may go unnoticed, while severe cases can cause swelling, crusting, and secondary bacterial infection requiring antibiotic treatment.
The exact cause is not fully understood, but plastic food and water bowls are strongly associated with chin acne — the porous surface of plastic harbours bacteria that are thought to contribute to follicular inflammation. Switching to stainless steel, ceramic, or glass bowls often leads to improvement or resolution in mild cases. Cleaning the chin with a gentle antiseptic wipe may help in persistent cases, and veterinary treatment with topical or oral antibiotics is needed when infection is present.
Diagnosis and When to See a Vet
Many cat skin conditions share overlapping signs — hair loss, scaling, and itching can result from parasites, infection, allergy, or hormonal disease. A veterinary examination is the starting point for accurate diagnosis and usually includes:
- Skin scrapes to identify mites
- Wood's lamp examination and fungal culture for ringworm
- Flea combing and response to treatment trial
- Elimination diet trial if food allergy is suspected
- Cytology of skin lesions to identify bacterial or yeast involvement
See a vet promptly if your cat develops rapidly spreading lesions, significant hair loss, open sores, signs of pain or distress, or if you suspect ringworm given its zoonotic potential. Medicated shampoos for supportive skin care in cats — including antifungal and antibacterial formulations — are available through Zooplus for EU-based owners, but should be used as directed by a vet rather than as a substitute for diagnosis.
Written by Sarah Bennett, vet-informed pet health editor at ForPetsHealthcare.