Why Is My Cat Pulling Out Their Fur? Causes of Over-Grooming in Cats

Cats are known to be meticulous groomers. A healthy cat may spend several hours a day licking and cleaning their coat. Grooming helps remove loose hair, distribute natural oils through the fur, and keep the skin healthy. But when the grooming becomes excessive, it can signal that something isn’t quite right.

If your cat has started licking, chewing, or even pulling out their fur, you may notice bald spots or thinning patches on their body. This condition is commonly referred to as over-grooming in cats, and in some cases, it can develop into a condition known as psychogenic alopecia. While stress is one possible cause, over-grooming can also result from allergies, parasites, or underlying medical problems.

What Is Over-Grooming in Cats?

Normal grooming keeps a cat’s coat clean and well maintained. However, over-grooming occurs when a cat repeatedly licks or chews the same area to the point that his or her hair breaks or falls out. Some cats even pull their fur out with their teeth, leaving behind smooth bald patches or areas where the hair looks very short and uneven.

Many cats focus their grooming on specific areas of the body. The belly, inner thighs, flanks, and legs are common targets, although some cats also over-groom their tail or lower back. Because cats are naturally quiet about their grooming habits, pet parents may not always see the behavior happening. Often the first clue is the sudden appearance of thinning fur or bald spots.

Psychogenic Alopecia and Stress

One possible explanation for excessive grooming is called psychogenic alopecia, a stress-related behavioral condition in cats. In these cases, grooming becomes a self-soothing activity that helps the cat cope with anxiety or environmental changes.

Cats tend to thrive on routine and familiarity. When their environment suddenly changes, they may experience stress that shows up in subtle ways. A move to a new home, the arrival of a new pet, changes in household schedules, or tension between pets can all trigger anxiety. Some cats hide or become withdrawn when stressed, while others redirect their nervous energy into repetitive grooming.

Over time, this behavior can become habitual. Even after the original stressor disappears, the grooming pattern may continue simply because it has become a coping mechanism.

Allergies and Itchy Skin

Allergies are actually one of the most common medical reasons cats begin pulling out their fur. When a cat’s skin becomes itchy, licking and chewing are natural responses. Unfortunately, repeated grooming can worsen irritation and lead to noticeable hair loss.

Flea allergy dermatitis is a frequent culprit. Some cats are very sensitive to the saliva of fleas and just one flea bite can trigger intense itching. In these cases, cats often focus their grooming on the lower back, tail base, and back legs. Because cats groom so thoroughly, they may remove the evidence of the fleas before pet parents ever notice them.

Environmental allergies can also cause itching and excessive grooming. Substances such as pollen, mold, and dust mites may trigger skin irritation in sensitive cats. Food allergies are another possibility. Certain proteins in a cat’s diet can lead to chronic itching that affects the belly, face, or ears, causing cats to lick the area repeatedly.

Parasites That Irritate the Skin

External parasites are another important cause of over-grooming. Fleas, mites, and other tiny pests can irritate the skin and trigger constant licking or chewing. Even indoor cats can occasionally be exposed to these parasites.

Mites, for example, can cause a condition similar to mange that leads to intense itching and hair loss. Because these parasites are often microscopic, they are not always visible without veterinary testing. Cats may groom so aggressively in response to the irritation that they remove the fur faster than it can grow back.

Pain or Medical Conditions

Not all excessive grooming is caused by itching. In some cases, cats lick an area of their body because it feels painful or uncomfortable. The grooming behavior is their attempt to soothe the discomfort.

For example, cats with arthritis may repeatedly lick their joints that feel sore. A cat experiencing bladder irritation or urinary problems might over-groom their lower belly. Anal gland issues, nerve pain, or other underlying medical conditions can also cause cats to focus on a particular part of their body. Because cats are very good at hiding pain, over-grooming may sometimes be one of the first visible clues that something is wrong.

How Veterinarians Diagnose Over-Grooming

Since many different issues can cause a cat to pull out their fur, veterinarians usually approach diagnosis step by step. The process typically begins with a thorough physical examination to look for signs of skin irritation, parasites, or infection.

Your veterinarian may check carefully for fleas and recommend preventative treatment even if none are immediately visible. Skin scrapings may be performed to look for mites, and fungal testing may be used to rule out infections such as ringworm. If allergies are suspected, your vet might suggest an elimination diet or other testing to identify potential triggers. Blood tests may also be recommended if an underlying medical condition is possible.

In some situations, once the medical causes have been ruled out, a veterinarian may determine that the grooming behavior is related to stress or anxiety.

Helping a Cat That Is Over-Grooming

Treating excessive grooming depends entirely on identifying the underlying cause. If parasites such as fleas or mites are responsible, effective parasite control usually resolves the problem once the skin has time to heal. When allergies are involved, treatment may include specialized diets, medications that reduce itching, or environmental adjustments that limit exposure to allergens.

If stress appears to be the trigger, improving the cat’s environment can often help reduce anxiety. Providing regular playtime, enrichment activities, and predictable daily routines can make a big difference. Some cats also benefit from calming pheromone products designed to mimic natural feline facial pheromones.

In more severe cases of psychogenic alopecia, veterinarians may recommend behavioral therapy or medications that help reduce anxiety and break the grooming cycle.

When to See Your Veterinarian

You should contact your veterinarian if you notice any of the following:

• Sudden bald spots or thinning patches of fur

• Skin that appears red, irritated, or scabbed

• Constant licking or chewing in the same area

• Hair loss that continues to worsen

• Changes in appetite, behavior, or energy levels

The Bottom Line

Excessive grooming in cats is usually a sign that something is bothering them. Whether the cause is psychogenic alopecia, stress, allergies, parasites, or an underlying medical condition, the behavior deserves attention. While occasional grooming is perfectly normal, hair loss and persistent licking are not.

By identifying the underlying cause and working with your veterinarian when necessary, you can help your cat return to comfortable, healthy grooming habits and help them regain their soft, full coat.