Why does my cat have bald patches?
Bald or thinning patches on a cat are common and have a range of causes, from fleas and allergies to a cat simply over-grooming an area that is bothering them. It is not something to diagnose at home — a vet can tell fairly quickly what is behind it, and several of the common causes are straightforward to manage once identified.
Usually not urgent
This is common and often manageable at home — but see a vet if it persists, gets worse, or comes with other changes.
What bald patches on a cat usually look like
Hair loss can show up as one clearly defined patch, several smaller ones, or a general thinning that is easier to feel than see, often along the back, flanks or belly. The skin underneath can look completely normal or show redness, scabbing or flaking depending on the cause.
Some cats pull the hair out themselves through grooming rather than losing it on its own, which leaves short, broken-looking stubble rather than smooth bare skin. That distinction — hair falling out versus hair being removed — is one of the first things a vet will look for.
Common causes
Fleas are one of the most frequent reasons, even in cats that rarely go outside, because flea allergy causes intense itching that leads to over-grooming around the base of the tail, neck and belly. A cat can carry fleas without an owner ever seeing one on the coat.
Stress and anxiety can drive a cat to over-groom a specific area repeatedly, sometimes in response to a change at home — a new pet, a house move, or a change in routine. This is a genuine behavioural cause and is treated differently from a skin or parasite problem.
Ringworm, despite the name, is a fungal infection rather than a worm, and it typically causes circular patches with a slightly scaly or crusty edge. It can also pass to people and other pets, which is one of the reasons it is worth having checked rather than guessed at.
Allergies to food or something in the environment, mites, and hormonal conditions can all produce hair loss too, and several of them look similar enough from the outside that telling them apart needs an examination rather than a search online.
When to see a vet
Get it looked at if the patch is spreading, if the skin underneath is red, scabbed, weeping or sore, if your cat seems to be grooming or scratching one area obsessively, or if the hair loss appears alongside any other change such as weight loss, a change in appetite or a change in behaviour.
A ring-shaped patch with a scaly edge is worth seeing a vet for promptly given the risk of it passing to people or other pets in the home. In general, hair loss that is new, worsening or accompanied by visible skin irritation is not something to wait out.
What can help day to day
Keeping up with flea prevention is one of the simplest things an owner can control, since flea allergy is such a common driver of over-grooming, and a consistent routine makes it easier to notice if the itching continues despite treatment.
Regular gentle grooming with a suitable brush lets you check your cat's skin and coat condition often, catching new patches early rather than after they have spread, and a calmer environment can help a cat whose over-grooming is linked to stress rather than a skin problem.
What a vet visit for hair loss usually involves
A vet will typically look closely at the pattern of hair loss, examine the skin underneath for redness, scabbing or parasites, and ask about any recent changes at home, in diet, or in routine. Depending on what they find, they may take a closer look at the coat and skin directly in the consultation room, which is usually enough to point towards a likely cause.
Getting a proper diagnosis rather than guessing at home matters because several causes look similar from the outside but need very different approaches — a parasite problem, a stress-related behaviour and a hormonal condition are not managed the same way, and treating the wrong one wastes time while the real cause continues.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.
Wahl Pet Grooming Scissors with Finger Rest
Stainless steel finishing scissors with ergonomic offset handles — perfect for tidying around eyes, ears, mouth, and paws.
£5.49
Groom Professional Curved Soft Slicker Brush
A professional-grade curved slicker brush with soft pins, designed to groom delicate and soft-coated pets without discomfort.
From£8.99
Wolseley A2 Clipper Blade — 78mm Width
A reliable professional clipper blade offering a 2–3mm depth of cut, well suited to routine winter clipping work.
£6.49
Pet Head Hair Mist Peony & Cashmere
Pet Head Hair Mist Peony & Cashmere is listed in our dog clothing range for pets. The page brings together the available option labels and the product facts that can be checked, so unsupported claims are left out.
£8.99
Common questions
- Will a bald patch on my cat grow back?
- Often, yes, once the underlying cause is dealt with — hair regrowth after fleas, an allergy flare or a stress episode is common. How quickly it grows back depends on the cause and how long the area has been affected, so ask your vet what to expect for your cat specifically.
- Can stress really cause a cat to lose hair?
- Yes. Over-grooming from stress or anxiety is a recognised cause of bald patches, usually in a specific spot the cat focuses on repeatedly. It is treated as a behavioural and environmental issue, and a vet can help work out what might be triggering it.
- Is ringworm serious in cats?
- It is generally treatable but does need proper diagnosis and management, partly because it can spread to other pets and to people in the household. A circular, scaly-edged patch is a reason to see a vet promptly rather than wait and see.
- Can indoor cats get fleas and lose hair from them?
- Yes, indoor cats can and do get fleas, often brought in on clothing, other pets or through an open door or window. Flea allergy is a common cause of hair loss even in cats that never go outside, which is why regular prevention matters regardless of lifestyle, and it is worth checking with your vet which product is suitable for your cat.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.