Why Do Cats Overgroom? Causes of Excessive Licking and Hair Loss

By Tailwisp Editorial TeamUpdated October 20, 20264 min read

Grooming keeps a cat clean, regulates temperature and calms nerves. But when a cat licks until the fur thins or skin gets raw, something is wrong. Overgrooming is a symptom with many possible causes, and finding the cause is key to fixing it.

Normal versus excessive grooming

Cats groom for a large portion of the day. It is normal for a cat to wash after eating, waking or play. Excessive grooming shows as:

• Thinning hair or bald patches, often on the belly, inner thighs, flanks or legs
• Short broken hairs, since the fur is licked or chewed off, not pulled out
• Red, irritated or scabbed skin
• A cat that grooms constantly, even when interrupted
• Hairballs, since swallowed fur accumulates. See cat vomiting causes.

Medical causes

Always see a vet first, since many cases have a physical cause.

• Fleas and other parasites. Even a single bite can trigger allergic itching. See fleas on cats.
• Allergies. Food allergies, environmental allergies and flea allergy. See cat food allergies and sensitive stomachs.
• Skin infections, such as bacteria, yeast or ringworm. See ringworm in cats.
• Pain. Arthritis, bladder problems or other discomfort can lead cats to lick the painful area. See feline idiopathic cystitis.
• Anal gland problems or other localized disease
• Hyperthyroidism and other hormonal conditions. See hyperthyroidism in cats.
• Dry skin or poor diet

Psychogenic overgrooming

When medical causes are excluded, stress or anxiety may be responsible. This is called psychogenic alopecia. Triggers include:

• Moves and changes in routine. See moving house with a cat.
• New pets, babies or visitors
• Conflict between cats. See aggression between cats.
• Boredom or lack of stimulation
• Separation anxiety. See cat separation anxiety.
• Loud noises
• Changes in the household

Some breeds, such as Siamese and Abyssinians, may be more prone to anxiety-related grooming. See the Siamese and Abyssinian profiles.

What the vet will do

• Examine the skin and coat, and look for parasites
• Check for pain and illness
• Do skin scrapes, fungal cultures or cytology
• Run blood and urine tests
• Recommend a flea control trial
• Suggest a diet trial for suspected food allergy
• Consider allergy testing

Use the US vet directory to find a clinic. See cat vet visit costs.

How to help

Treat medical causes. Follow the vet's plan, including medication, flea control and diet.

Reduce stress.

• Keep routines predictable.
• Provide hiding places and vertical space. See cat-friendly home setup.
• Offer separate resources in multi-cat homes.
• Use pheromone diffusers, if recommended.

Provide enrichment. Daily play, puzzle feeders and window perches. See indoor cat enrichment ideas.

Redirect. When your cat begins to overgroom, distract with a toy or a treat, without scolding.

Protect the skin. A soft recovery collar or suit can prevent damage while treatment works, but it is only temporary.

Medication. In severe cases, vets may prescribe anti-anxiety medication alongside behavior changes.

What not to do

• Do not punish or shout.
• Do not assume it is behavioral without a vet exam.
• Do not apply creams or products without advice.

How to tell a medical problem from a behavioral one

Owners cannot reliably tell the difference at home. Some clues help your vet, though. Itchy cats often lick or scratch around the head and neck as well as the body, and the skin looks red or scabby. Cats grooming because of bladder or joint pain often target one area, such as the lower belly or a leg. Stress-related grooming often begins after a clear change, and cats may groom more when they are alone or after a conflict. Even so, a vet exam is required, because pain and allergy are frequently hidden.

Diet and allergy trials

If a food allergy is suspected, your vet may suggest an elimination diet using a prescription or novel-protein food for about eight weeks, with no other treats or flavored medications. This is the only reliable way to diagnose a food allergy. See cat skin allergies for more on environmental and flea allergy.

Keep a diary

Note when grooming happens, how long it lasts and what happened beforehand. Take photos each week of the affected areas, so you and your vet can see progress. Track new products in the home, such as laundry detergents, cleaners or plug-ins, which can irritate skin.

Long-term outlook

Many cats improve once the underlying cause is treated and stress is reduced, though some need ongoing management. Hair usually regrows within weeks to months when the licking stops. Be patient, and keep routines predictable.

When it is urgent

See a vet quickly if the skin is raw, bleeding or infected, or if the cat is lethargic, not eating or showing other signs. See the emergency warning signs guide.