# Why Is My Cat Ripping Out His Fur? Over-Grooming Causes If your cat is ripping out his fur, the cause is usually either a physical problem that makes the skin itch or hurt, or a behavioral problem that drives compulsive grooming. Cats with hair loss who scratch or chew the area excessively should have the itching problem investigated first [1]. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Over-grooming is common. Cats normally spend 30 to 50 percent of their day grooming, so many owners do not notice a problem until they see bald patches or skin sores [2]. - The pattern of hair loss is a clue, not a diagnosis. Licking at the tail head often points to fleas, while pollen or food allergies may cause licking on the back or belly [2]. - Skin problems and stress feed each other. A stressed cat can cause skin lesions through over-grooming, and a cat with a painful or itchy skin condition can become more stressed and groom more [3]. - Most cases are not emergencies, but sudden bald patches with red, broken, or oozing skin need a same-day call. - Do not start human anti-itch or steroid creams on your cat. Many are toxic to cats, and they hide the skin changes your veterinarian needs to see. ## What Fur-Pulling Actually Looks Like Cats are private groomers. They lick, nibble, and chew in short bursts, often when you are not watching. Normal grooming keeps the coat clean and spreads natural oils. It becomes a problem when the behavior changes in frequency, duration, or intensity [2]. The classic sign is a "mowed" look. The hair is chewed down to a short stubble over the belly, flanks, inner thighs, or tail base. Some cats pull fur in clumps, leaving bare skin. Others create thin or patchy coats you can see through. In psychogenic alopecia, the hair loss often follows a symmetrical pattern on areas the cat can reach with its tongue [4]. Some cats also damage the skin. You may see redness, scabs, small ulcers, or moist sores. Hair loss is a sign, not a disease, and the underlying cause must be found before it can be treated [1]. ## Why Is My Cat Ripping His Fur Out? The Main Causes Veterinarians sort these cases into two broad groups, medical and behavioral, but the two overlap constantly. Inflammatory skin disorders are the most common cause of acquired hair loss in cats [1]. Here are the main culprits. ### Itchy Skin and Allergies Allergies are a leading reason cats lick themselves bald. Flea allergy, food allergy, and environmental allergies (pollen, dust, mold) all cause itching. Cats with pollen or food allergies often lick their backs, abdomens, or other areas [2]. The itching drives the grooming, and the grooming drives the hair loss. ### Parasites Fleas are the most common parasite behind tail-head chewing and scabbing [2]. Other external parasites can cause intense itch. Some internal parasites and skin mites also trigger grooming. Kittens with parasites may over-groom, and the location of the "mowed" area helps your vet narrow the list [2]. ### Pain and Internal Disease Cats do not always limp when they hurt. They lick. Arthritis, bladder pain, dental pain, and abdominal discomfort can all cause a cat to focus on one area. In rare cases, hair loss is a paraneoplastic sign, meaning it is caused by a tumor elsewhere in the body. One report described a cat with ventrally distributed alopecia and shiny skin that was linked to an abdominal apocrine adenocarcinoma [5]. This is uncommon, but it is why vets look beyond the skin. ### Stress and Compulsive Behavior Stress can cause skin and coat lesions such as alopecia, ulcers, and self-mutilation [3]. Common triggers include a new pet, a new baby, moving, a change in litter box routine, or the loss of a companion. Some cats develop compulsive grooming that continues even after the original trigger is gone. This is sometimes called psychogenic alopecia. Cats with this condition groom fewer body parts but focus on them intensely [4]. ### Hormonal and Other Causes Hormonal disorders and noninflammatory conditions can also cause hair loss, though inflammatory disorders are more common [1]. Your veterinarian will consider these when the skin does not look itchy or inflamed. | Cause | Typical clues | How urgent | |---|---|---| | Fleas or parasites | Chewing at tail base, scabs, visible fleas or flea dirt | Routine, same week | | Food or environmental allergy | Licking belly, back, or paws, often seasonal or after diet changes | Routine, same week | | Pain (arthritis, bladder, dental) | Licking one spot, stiffness, litter box changes, appetite changes | Same-day to routine | | Stress or compulsive grooming | Symmetrical bald patches, life changes, normal skin underneath | Routine, but call if skin breaks | | Skin infection (bacterial or fungal) | Redness, odor, crusts, spreading patches | Same-day | | Paraneoplastic alopecia | Bald belly and legs with shiny skin, weight loss, lethargy | Same-day, urgent | | Hormonal disease | Symmetrical hair loss without itching, other systemic signs | Routine | ## Red Flags That Mean Call Now Most over-grooming can wait for a scheduled visit. Some signs cannot. Call your veterinarian the same day if you see: - Open sores, bleeding, or oozing skin - Bald patches that appeared suddenly over hours or days - Hair loss along with weight loss, vomiting, diarrhea, or hiding - A cat who stops eating or drinking - Swelling, heat, or a bad smell from the skin Go to an emergency clinic now if your cat is: - Struggling to breathe - Collapsed, weak, or unable to stand - Having seizures - Bleeding heavily and it will not stop - Showing severe pain when touched If you are unsure whether your cat ate something toxic, call the ASPCA Animal Poison Control Center at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661. Both may charge a consultation fee. ## Safe Things You Can Do at Home You cannot diagnose this at home, but you can gather information and reduce harm while you wait for your appointment. ### Stop the Itch Cycle Where You Can Use a flea preventive your veterinarian recommends, and treat all pets in the home. Flea allergy is a common and treatable cause of tail-head chewing [2]. Wash your cat's bedding in hot water. Vacuum carpets and furniture. ### Do Not Apply Human Products Never put hydrocortisone, antibiotic ointment, or anti-itch cream on your cat without veterinary approval. Cats groom themselves, so anything on the skin goes into the mouth. Many human products are toxic to cats. ### Reduce Stress Keep routines steady. Feed at the same times. Scoop the litter box daily. Give your cat a quiet room with a hiding spot if the household is busy. If a new pet or person joined the home, introduce changes slowly. ### Track the Pattern Take photos of the bald areas every few days. Note when the grooming happens (after meals, at night, after you leave). Write down any diet changes, new treats, new cleaners, or new pets. This history helps your veterinarian more than almost anything else. ### Use an Elizabethan Collar if Needed If your cat is creating open sores, a soft collar can stop the damage while you wait for the visit. Ask your vet which type is safest for your cat. ## What Your Veterinarian Will Check Your veterinarian will start with a full physical exam, not just the skin. They will look at the pattern of hair loss, the condition of the skin underneath, and whether the cat seems itchy or painful. ### Questions You Will Be Asked Expect questions about diet, flea control, other pets, recent changes, litter box habits, appetite, and water intake. The location of the "mowed" area gives a clue to the cause, but there is great overlap between conditions [2]. ### Common Tests Depending on the exam, your vet may recommend: - Skin scraping or tape prep to look for mites and parasites - Flea combing and skin cytology to check for infection - A fungal culture if ringworm is suspected - Blood work and urine testing to rule out hormonal or internal disease - A food trial with a prescription diet if food allergy is suspected - Imaging if pain or an internal mass is possible ### Treatment Depends on the Cause There is no single treatment for over-grooming. Veterinary management depends on finding and correcting the underlying disorder [6]. If the cause is behavioral, your vet may discuss environmental changes, behavior modification, or medication. One controlled study found no evidence that clomipramine alone reduced grooming, alopecia, or improved hair regrowth in cats with psychogenic alopecia, so medication is rarely a stand-alone fix [7]. Any drug dose is calculated by your veterinarian based on your cat's weight and health. ## Prevention and Monitoring You cannot prevent every case, but you can lower the odds and catch problems early. - Stay current on flea prevention year-round. - Feed a consistent, complete diet and introduce new foods slowly. - Keep litter boxes clean and plentiful (one per cat plus one). - Watch for changes in grooming during stressful events like moves or new pets. - Weigh your cat monthly and note any drop. - Photograph the coat every few weeks if your cat has a history of over-grooming. If your cat keeps ripping his fur out, keep a log and bring it to every visit. Patterns over time are more useful than a single snapshot. ## Limitations and When to Contact a Veterinarian This article cannot tell you what is causing your cat's hair loss. Only a veterinarian who examines your cat can do that. Individual cases need a veterinarian, and the plan for your cat will depend on the exam findings, your cat's age, and other health conditions. Use these timing guidelines: - Emergency now: trouble breathing, collapse, seizures, heavy bleeding, severe pain. - Same day: open sores, sudden widespread hair loss, weight loss, vomiting, or a cat who stops eating. - Routine visit within a few days to a week: stable bald patches, mild itching, no skin damage. - Recheck as directed: if treatment is not working after the time your vet set, call back instead of waiting. ## Frequently Asked Questions ### Is my cat pulling out fur because of stress? Stress is one possible cause, but it is not the only one. Stressed cats can develop alopecia, ulcers, and self-mutilation, and physical illness can also raise stress and grooming [3]. Your veterinarian needs to rule out itching, parasites, and pain before calling it behavioral. ### Can food allergies make a cat pull out fur? Yes. Cats with food allergies often lick their backs, abdomens, or other areas, which can lead to bald patches [2]. A proper food trial with a prescription diet is the usual way to test this, and it must be done with veterinary guidance. ### Will the fur grow back? In most cases, yes, once the underlying cause is treated and the cat stops damaging the follicles. Hair regrowth takes time, often weeks to months, depending on the cat and the cause. If the follicles are scarred, regrowth may be patchy. ### Should I put a cone on my cat? A soft collar can protect open sores while you wait for your appointment. Ask your veterinarian which style fits your cat and how long to use it. Do not leave a collar on for long periods without checking the skin underneath. ### Can I just wait and see if it stops? You can wait a day or two if the skin looks normal and your cat is eating, playing, and using the litter box normally. Do not wait if you see sores, weight loss, or a sudden change. Early visits are usually simpler and less expensive than treating a chronic skin problem later. For more help with related grooming and skin problems, see [Why Is My Cat pulling out fur in clumps? Psychogenic Alopecia and Over-Grooming](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-pulling-out-fur-in-clumps-psychogenic-alopecia-and-over-grooming), [Why Is My Cat Grooming So Much?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-grooming-so-much), and [Cat Licking Fur Off: Causes and How to Help](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-licking-fur-off-causes). ## Related Articles - [Why Is My Cat pulling out fur in clumps? Psychogenic Alopecia and Over-Grooming](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-pulling-out-fur-in-clumps-psychogenic-alopecia-and-over-grooming) - [Why Is My Cat Grooming So Much?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-grooming-so-much) - [Why Is My Cat Losing Hair?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-losing-hair) - [Cat Licking Fur Off: Causes and How to Help](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-licking-fur-off-causes) - [Why Is My Cat So Itchy?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-so-itchy) - [Cat Overgrooming: Why It Happens and What to Do](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-overgrooming) - [Cat Losing Clumps of Fur: Causes of Patchy Hair Loss](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-losing-clumps-of-fur) - [Cat Pulling Hair Out: Home Remedies and Causes](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-pulling-hair-out-remedies) - [Cat Not Grooming: Why It Happens and What to Do](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-not-grooming-itself) ## References 1. [Hair Loss (Alopecia) in Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/skin-disorders-of-cats/hair-loss-alopecia-in-cats). Merck Veterinary Manual. 2. [Cats that Lick Too Much](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/cats-lick-too-much). Cornell University College of Veterinary Medicine. 3. [Skin Disease and Behavior Changes in the Cat](https://pubmed.ncbi.nlm.nih.gov/37852882/). The Veterinary clinics of North America. Small animal practice, 2024. 4. [Exploring Normal to Abnormal Variations of Grooming Behaviours in Cats](https://pubmed.ncbi.nlm.nih.gov/42504124/). Veterinary dermatology, 2026. 5. [Putative paraneoplastic alopecia in a cat with apocrine adenocarcinoma](https://pubmed.ncbi.nlm.nih.gov/39588723/). Veterinary dermatology, 2025. 6. [Alopecia management from a comparative perspective: pharmacological and pharmaceutical insights in humans, dogs, and cats](https://pubmed.ncbi.nlm.nih.gov/42713429/). Frontiers in veterinary science, 2026. 7. [Does treatment with clomipramine reduce cat psychogenic alopecia?](https://pubmed.ncbi.nlm.nih.gov/42007014/). Veterinary evidence, 2022. ## 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)