# Is Seborrhea in Cats Contagious? Causes and Treatment Is seborrhea in cats contagious? No. Seborrhea is a skin condition, not an infection you can catch from your cat, and your cat cannot catch it from another cat. It is a disorder of how the skin makes and sheds its outer layer, and it usually happens because of another underlying problem. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Seborrhea in cats is not contagious to people or to other pets. - It is uncommon in cats, and most cases are "secondary," meaning another disease is driving the skin changes [1]. - Common triggers include allergies, hormonal (endocrine) diseases, and skin infections [1]. - Primary seborrhea, a rare inherited keratinization defect, is not itchy on its own [1]. - Treatment focuses on finding and fixing the underlying cause, plus regular bathing and skin care. ## What Seborrhea Actually Is Seborrhea is a problem with keratinization. Keratinization is the process your cat's skin uses to build and shed its outer layer. When that process speeds up or goes wrong, the skin produces too much scale, and sometimes too much oil. The result is flaky, greasy, or crusty skin and a dull, clumpy coat [1]. Veterinarians divide seborrhea into two types. Primary seborrhea is a very rare inherited keratinization disorder. It is not itchy by itself [1]. Secondary seborrhea is far more common. In this form, an underlying disease causes the scaling and greasiness you see [1]. Seborrhea is more common in dogs than in cats, and in dogs secondary seborrhea is more common than the primary form [1]. This distinction matters for treatment. If your cat has secondary seborrhea, bathing alone will not fix the problem. You have to treat the disease underneath it. ## Signs Owners Notice Seborrhea can look different from cat to cat. Some cats have dry, flaky skin that looks like heavy dandruff. Others have a greasy, waxy coat that feels oily to the touch. Some have both at once, or the appearance shifts over time. Watch for these signs: - White or yellowish flakes on the skin and in the coat - Greasy, clumpy, or matted fur, especially along the back and near the tail base - A dull coat that does not improve with normal grooming - Crusts, thickened skin, or a bad odor - Redness or sores, which often point to a secondary skin infection - Itching, which is more likely when an allergy or infection is involved [1] If the coat is greasy and matted and your cat is also losing weight or eating more than usual, an endocrine disease such as hyperthyroidism may be involved. You can read more about that pattern in [Why Is My Cat having greasy matted fur? Hyperthyroidism and Seborrhea](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-having-greasy-matted-fur-hyperthyroidism-and-seborrhea). Itching is a separate clue. Cats with feline atopic skin syndrome, an allergic skin disease, can have seborrhea along with their itch [2]. If your cat scratches, chews, or overgrooms, see [Why Is My Cat So Itchy?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-so-itchy) for help sorting out the cause. ## Causes and Risk Factors ### Why Most Seborrhea Is Secondary In secondary seborrhea, a primary underlying disease changes the skin's environment and its oil production. The most common underlying causes are endocrine (hormonal) diseases and allergies [1]. Sometimes the underlying disease shows up first as seborrhea, with the original problem hidden underneath [1]. ### Allergies Feline atopic skin syndrome and food allergies are frequent drivers. Cats with this condition often have both itching and seborrhea, and the seborrhea can be scored and tracked as part of the skin disease [2]. ### Endocrine Disease Hormonal conditions such as thyroid disease can change the coat and skin. These cats often have a poor, greasy coat along with other systemic signs. ### Infections and Skin Invaders Seborrheic skin is easier for bacteria and yeast to colonize, and those infections make the scaling and odor worse. Malassezia yeast is a common finding in feline ear and skin disease [3]. Parasites such as ear mites can also cause inflammation that leads to seborrheic changes [3]. If your cat has a skin infection, see [Cat Skin Infection: Signs and Treatment Options](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-skin-infection). ### Ringworm: A Look-Alike, Not the Same Thing Ringworm (dermatophytosis) can cause scaling and hair loss that looks like seborrhea, and it is contagious. Microsporum canis is the most commonly isolated dermatophyte in cats [4]. Persian cats and long-haired cats are at higher risk, and young age and lifestyle also play a role [4]. Ringworm can spread from a cat to people in the household, which is why it must be ruled out [5]. Learn more in [Ringworm In Cats](/knowledge/veterinary-medicine/parasitic-diseases/ringworm-in-cats). ### Primary Seborrhea Primary seborrhea is a rare inherited defect in keratinization. It is not itchy, and it is diagnosed only after other causes are ruled out [1]. | Feature | Primary Seborrhea | Secondary Seborrhea | |---|---|---| | How common | Very rare [1] | Most seborrhea cases [1] | | Cause | Inherited keratinization defect [1] | Another disease underneath [1] | | Itching | Not itchy [1] | May or may not itch [1] | | Contagious | No | No | | Treatment focus | Bathing and skin care [1] | Treat the underlying disease [1] | ## How It Is Diagnosed There is no single test that says "seborrhea." Your veterinarian diagnoses it by examining the skin and then working backward to find the cause. Primary seborrhea is diagnosed by ruling out other underlying causes [1]. Expect a stepwise approach: - **History and physical exam.** Your vet asks about diet, itching, grooming, weight, appetite, and other pets in the home. - **Skin scrapings and tape preparations.** These look for mites, yeast, and bacteria. - **Cytology.** A sample of the skin surface shows whether yeast or bacteria are overgrowing. - **Fungal culture and Wood's lamp exam.** These check for ringworm, which can mimic seborrhea [4]. - **Blood work.** Thyroid and other hormone tests help find endocrine disease. - **Allergy workup.** If itching is a major sign, your vet may investigate food or environmental allergies. - **Skin biopsy.** In some cases, a biopsy helps confirm the type of seborrhea and rule out other skin diseases. Because several conditions can look alike, diagnosis can take more than one visit. That is normal, and it is not a sign your vet is missing something. ## Treatment Options Treatment has two parts: fix the underlying problem, and manage the skin itself. ### Treating the Underlying Cause If allergies are driving the seborrhea, controlling the allergy controls the skin. If a hormonal disease is found, treating it often improves the coat. If yeast or bacteria are overgrowing, your vet treats those infections. This is why a correct diagnosis matters more than any single shampoo. ### Bathing and Skin Care Frequent bathing is a mainstay of seborrhea care [1]. Your veterinarian will choose a medicated shampoo based on whether your cat's skin is dry, greasy, or infected. Follow the contact time on the label, because many medicated shampoos need to sit on the skin for several minutes to work. Some cats tolerate bathing well. Others do not. Ask your vet for a plan that fits your cat's temperament, and never use a dog product or a human shampoo unless your veterinarian approves it. ### Topical Products An adsorbent mousse containing tapioca starch, adelmidrol, and a nonpharmacological antimicrobial complex was studied in cats with allergic skin disease and associated seborrhea [2]. In that small pilot study, seborrhea scores improved over the treatment period [2]. Ask your veterinarian whether a product like this fits your cat. ### Medications For primary seborrhea, treatment includes frequent bathing plus vitamin A or a retinoid [1]. These are prescription decisions. Your veterinarian calculates the dose from your cat's weight and health, and some of these drugs require monitoring. Never give your cat a supplement or medication without veterinary guidance. ### Managing Infections If your cat has a bacterial or yeast infection on top of the seborrhea, that infection needs its own treatment. Clearing it often makes the scaling and odor much better. ## Recovery, Outlook, and Long-Term Management The outlook depends on the cause. If the underlying problem can be cured, the seborrhea often resolves with it. If the cause is a lifelong condition such as an allergy or an endocrine disease, seborrhea becomes something you manage over time. Most cats need ongoing home care. That usually means a bathing schedule, regular brushing to remove loose scale, and routine rechecks. Your veterinarian may adjust the plan as the skin changes. Keep a simple log. Note how the coat looks, whether your cat is itchy, and how often you bathe. This helps your vet judge whether the plan is working. Watch for flare-ups. Increased odor, new crusts, or more itching often means a secondary infection has returned and needs treatment. ## Prevention You cannot always prevent seborrhea, especially when it comes from an inherited defect or an allergy. But you can lower the odds of flare-ups and catch problems early. - Keep up with routine veterinary exams, especially if your cat has a known allergy or hormone condition. - Follow the bathing and grooming plan your vet sets. - Treat skin infections promptly instead of waiting for them to spread. - Feed a complete, balanced diet and keep your cat at a healthy weight. - Control fleas and other parasites, since parasite inflammation can worsen skin disease. - If ringworm is in the picture, handle your cat carefully and wash your hands, because it can spread to people [5]. ## Limitations and When to Contact a Veterinarian Seborrhea itself is not an emergency, but some signs need prompt attention. Individual cases need a veterinarian, so use these as a guide. **Contact your veterinarian the same day if you see:** - Rapidly spreading redness, swelling, or open sores - A bad smell or pus from the skin - Your cat stops eating or seems painful when touched - New hair loss that is spreading quickly **Go to an emergency clinic now if you see:** - Trouble breathing, collapse, or severe weakness - A large area of raw, bleeding, or ulcerated skin - Vomiting, lethargy, or other signs of serious illness along with the skin problem **Schedule a routine visit if you see:** - Persistent flaking, greasiness, or a dull coat - Mild itching that is not improving - Scaling that comes back after bathing - Any skin change in a cat with a known allergy or hormone disease ## Frequently Asked Questions ### Can my other cats catch seborrhea from my cat? No. Seborrhea is not an infectious disease, so it does not pass between cats. If more than one cat in your home has skin problems, each cat needs its own evaluation, because the causes are usually different or environmental. ### Can I catch seborrhea from my cat? No. Seborrhea is not zoonotic, meaning it cannot spread from cats to people. Some conditions that look like seborrhea, such as ringworm, can spread to people, which is one reason a veterinary exam matters [5]. ### Is seborrhea the same as dandruff in cats? It is related but broader. Dandruff is one visible sign of seborrhea, which also includes greasy skin and coat changes. Seborrhea describes the underlying keratinization problem, and dandruff is often the first thing owners notice. ### Will my cat need baths forever? Many cats need long-term bathing to keep the skin and coat under control, especially if the underlying cause is lifelong [1]. Your veterinarian will set the schedule based on your cat's skin and how well it responds. ### Can seborrhea be cured? Primary seborrhea is managed, not cured, with frequent bathing and medication [1]. Secondary seborrhea may resolve if the underlying disease can be treated, but it becomes a long-term management issue when the cause is chronic. ## Related Articles - [Why Is My Cat having greasy matted fur? Hyperthyroidism and Seborrhea](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-having-greasy-matted-fur-hyperthyroidism-and-seborrhea) - [Cat Skin Infection: Signs and Treatment Options](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-skin-infection) - [Cat Sneezing a Lot: Allergies, Infection, or Something Else?](/knowledge/veterinary-medicine/vet-visit-decisions/cat-sneezing-a-lot) - [Ringworm In Cats](/knowledge/veterinary-medicine/parasitic-diseases/ringworm-in-cats) - [Why Is My Cat So Itchy?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-so-itchy) - [Cat Ear Infection with Redness: Causes and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-ear-infection-with-redness-causes-and-when-to-worry) - [Seborrhea in Cats: Greasy or Flaky Skin and How to Treat It](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/seborrhea-cats-treatment-symptoms) - [Is Stomatitis in Cats Contagious to Other Pets or People?](/knowledge/veterinary-medicine/dental-care/is-cat-stomatitis-contagious) - [Is Gingivitis in Cats Contagious? What You Need to Know](/knowledge/veterinary-medicine/dental-care/is-gingivitis-in-cats-contagious) ## References 1. [Seborrhea in Animals - Integumentary System](https://www.merckvetmanual.com/integumentary-system/seborrhea/seborrhea-in-animals). Merck Veterinary Manual. 2. [An open-label pilot study on an adsorbent mousse containing adelmidrol in client-owned cats with feline atopic skin syndrome and associated seborrhoea](https://pubmed.ncbi.nlm.nih.gov/40314094/). Veterinary dermatology, 2025. 3. [Otitis externa in free-roaming cat population: Clinical examination, cytology, and mycology culture](https://pubmed.ncbi.nlm.nih.gov/40453858/). Open veterinary journal, 2025. 4. [Epidemiological and Clinical Features of Dermatophytosis in a Referral Practice in Italy: A Retrospective Study in Different Feline Breeds](https://pubmed.ncbi.nlm.nih.gov/41622572/). Veterinary dermatology, 2026. 5. [Microsporum canis infection from a cat : A source of tinea capitis and dermatophytosis in an entire family](https://pubmed.ncbi.nlm.nih.gov/40586808/). Dermatologie (Heidelberg, Germany), 2025. ## Further Reading - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)