Overview
Unhealthy cat claws are more common than you might think — especially in older or indoor cats. You might notice signs like overgrown nails, limping, or constant licking at the paws. Some claws may look cracked, brittle, thickened, or discoloured. Others might grow inwards or split. These problems can result from injury, infection, immune disorders, or poor maintenance, and they often develop gradually.
The good news? Most claw issues are treatable and preventable. With early spotting, proper trimming, and good scratching routines, you can help your cat avoid pain and stay comfortable on their feet.
What can cause unhealthy cat claws?
Several things can cause claw problems in cats. Here are some of the most common:
Injuries and trauma: snagging a claw on carpet or fabric, or landing badly after a jump, can crack or break a nail — especially if it’s already brittle.
Infections: bacterial or fungal infections like ringworm can cause swelling, discharge, and soreness around the nail bed, often affecting more than one claw.
Health conditions: problems like diabetes, allergies, or immune disorders can weaken claws or lead to infections. These tend to develop gradually and may need long-term care.
Grooming or mobility issues: older cats or those with arthritis may struggle to groom or scratch properly, leading to overgrown claws that press into their paw pads.
Poor diet: claws need nutrients like protein, zinc, and omega-3s. Deficiencies can cause brittle, misshapen, or slow-growing claws.
Lifestyle factors: indoor cats may not shed old claw sheaths or wear nails down without regular scratching. Outdoor cats face more risks from injury or infection.
Often, there’s more than one cause. An older indoor cat, for example, may have unhealthy cat claws due to age, limited scratching, and a less balanced diet.
Read more: How to cat-proof your home
What are the symptoms of unhealthy cat claws?
Cats are good at hiding pain, so it’s often the subtle changes that reveal something’s wrong with their claws or paws. Look out for:
Limping or moving differently: they might avoid putting weight on a paw or seem slower than usual.
Licking or chewing a paw: repeated grooming of one foot often means it’s sore.
Swollen or weeping nails: this can point to infection or irritation around the nail bed.
Claws that look odd: if they’re thick, cracked, or brittle, something’s not right.
Snagging on fabrics: regularly catching claws can mean they’re too long or splitting.
Claws showing when resting: visible nails when your cat is relaxed could mean they’re overgrown.
Unusual nail colour: yellow or brown staining can suggest infection.
Changes in behaviour: it could be another clue if your cat is avoiding jumping or climbing, grooming less, ignoring their scratching posts, or resting more than usual.
When to see the vet
Some signs need prompt vet care:
Pus, bleeding, or swelling: these often mean infection, especially around the nail bed.
Ingrown claws: if a claw is growing into the paw pad, it’s painful and needs treatment.
Claws falling out: this could be due to trauma, infection, or illness.
Sudden changes in nail colour or shape: especially if it affects several claws, this can point to a wider health issue.
Excessive licking or chewing at the feet or nails: this can indicate pain or discomfort.
Infections and injuries rarely get better on their own — they usually need treatment. When in doubt, speak to your vet.
How are unhealthy cat claws diagnosed?
Your vet will start with a physical check of your cat’s paws and claws, looking for swelling, pain or infection. If only one claw is affected, it may be a minor injury. But if several nails — or multiple paws — are involved, a wider health issue could be the cause. They might recommend:
Swabs or scrapes to check for bacterial or fungal infections
Clipping or sheath removal to get a clearer view of the nail bed
Imaging (like X-rays) to rule out hidden injuries or growths
Blood tests to check for underlying issues like diabetes or immune problems
A biopsy if a tumour or rare immune condition is suspected (this is uncommon)
How to prepare
Before your visit, try to note:
When the problem started and whether it’s improving or getting worse
Any changes in movement or grooming
Avoidance of scratching posts or play
Any knocks or accidents that might explain an injury
Any other symptoms, such as changes in appetite, thirst, or urination
You don’t need to have everything, but even small details can help your vet get to the root of the problem. Spotting issues early gives your cat the best chance of healing well and feeling comfortable again.
How do I prevent unhealthy cat claws?
Keeping your cat’s claws healthy doesn’t have to be difficult. Simple routines — done regularly — can prevent most problems and support long-term health.
Check claws weekly: especially in older or indoor cats. Look for overgrowth, curling, cracks, or retained sheaths.
Encourage scratching: scratching helps cats shed claw sheaths and naturally file their nails. Offer posts made of sisal, cardboard, or carpet. Provide both vertical and horizontal options near resting spots and furniture.
Keep them active: movement promotes healthy claws. Play regularly with toys that involve climbing, jumping, and pouncing.
Support with nutrition: feed a complete, balanced diet. If your cat’s claws are brittle, break easily, or heal slowly, speak to your vet. They may suggest diet tweaks or supplements like omega-3 or biotin.
Tailor care to lifestyle: indoor cats often need more help with claw wear. Outdoor cats may file claws naturally but still risk injury — both benefit from regular checks.
If your cat has ongoing claw issues, check with your vet. Keeping paws clean and dry can support healing, but brittle claws, infections, or ingrown nails need proper treatment. Avoid using over-the-counter creams or online remedies without guidance — these may delay recovery or cause harm.
Tip: Check your cat’s paws weekly when they’re relaxed. One odd claw might be from a knock or snag. But if several look unusual, it’s best to get your vet’s advice.
How to trim cat claws?
If your cat needs help keeping their claws short, here’s how to make claw care calm and positive — for both of you.
1. Pick the right moment: choose a quiet, well-lit spot when your cat’s relaxed — after a nap, play, or a meal. Have clippers, treats, and styptic powder (or cornflour) ready.
2. Gently hold their paw: sit beside your cat or have them on your lap. Gently press a toe pad to extend the claw. You can wrap them in a towel if needed. A second person can help with treats or calming.
3. Trim with care: look for the pink area (the “quick”) inside light claws. Only trim the clear, curved tip. For dark nails, take just a little (the sharp point) off the end to avoid cutting too far.
4. Use the right tools: use sharp, cat-specific clippers. Hold them perpendicular to the claw and cut in one smooth motion. Avoid dragging or crushing. Give praise or treats straight after to help them build positive associations.
5. Go at their pace: watch for signs of stress — like a twitchy tail or stiff posture. If needed, stop and try again later. A few calm claws are better than rushing through all of them. If you go too far and cut into the quick, don’t worry. Apply pressure and use styptic powder or cornflour to stop the bleeding. Keep your cat calm and call your vet if it doesn’t stop.
6. Give them a treat: your cat will find nail trimming less stressful in the future if they know they’ll get a few treats out of it. Letting them enjoy a snack after each paw is done often works best.
If your cat is very anxious, or the claws are overgrown, damaged or painful, ask your vet or groomer for help. They can show you how or do it for you (and if you’re a Pet Health Club member, it’s included in your membership). Weekly paw checks and trimming every few weeks to months (if needed) help prevent claw issues.
Read more: Why is my cat shedding so much?
How are unhealthy cat claws treated?
The right treatment depends on the cause. Here’s what to expect from your vet — and how you can help at home.
At the vet:
Treatment will match the type and severity of the problem:
Injuries: torn or split claws may need trimming, cleaning and dressing to stop infection.
Infections: bacterial or fungal issues are usually treated with prescription tablets, creams or both.
Severe cases: swelling, abscesses, or overgrowths might need draining, or claw removal under sedation. Claw removal for medical purposes only affects the damaged claw — not like declawing, which removes the whole toe.
Underlying conditions: long-term problems like autoimmune diseases or tumours may need ongoing care, such as medication or surgery.
Pain relief: often given to keep your cat comfortable during recovery.
Read more: Why your cat is peeing outside the litterbox
Caring for your cat at home:
After your vet’s assessment, they may suggest ongoing care at home. This could include:
Keeping paws clean and dry
Using creams or tablets exactly as prescribed
Limiting activity during recovery
Stopping your cat from licking wounds (a soft cone or recovery suit may help)
Watching for signs of healing or problems, like swelling or limping
Giving your cat prescribed medicine
Avoid DIY treatments unless your vet has advised them. Even natural products can do more harm than good — and never try to remove damaged claws or drain infections yourself. Home care is most effective when it follows a plan from your vet. With early treatment and a bit of patience, most cats recover well.
Unhealthy cat claws FAQs
How often should I trim my cat’s claws?
It depends on their lifestyle. Indoor or less active cats may need trimming around every four weeks. Outdoor or active cats often wear their claws down naturally. Regular checks help you spot when claws are getting too long or starting to curl.
How many claws does a cat have?
Most cats have 18 claws: five on each front paw (including the small dew claw), and four on each back paw. Some cats are born with extra toes (this is a harmless condition called polydactyly) which means they may have a few more claws than usual.
Is it normal for cats to shed claw sheaths?
Yes — it’s part of natural claw renewal, usually every few months. You might find small, curved, clear shells around the house. That’s normal. But if the sheath sticks or the claw underneath looks odd, it could be a sign of injury or overgrowth.
What is the “quick”, and how do I avoid cutting it?
The quick is the sensitive core inside the claw, with nerves and blood vessels. It looks pink in light nails, but may be hard to see in dark ones. Always trim just the clear tip. Stop if you see a shadow near the cut line — cutting the quick causes pain and bleeding.
Are nail caps safe?
They can be, if used short-term and fitted correctly. But they’re no replacement for trimming or scratching. Nail caps may affect your cat’s ability to scratch, shed claws or stretch. If you use them, check regularly and offer scratchers as well.
Can a change in diet improve my cat’s claw health?
Yes. A balanced diet helps support strong claws, healthy skin, and a resilient immune system. Lacking nutrients like zinc, biotin, or omega-3s can lead to brittle or malformed claws. If you’re unsure, your vet can advise on food or supplements.
Do indoor cats get more claw problems?
Indoor cats miss out on natural wear from rough surfaces. Their claws may overgrow, curl, or shed poorly. Less scratching can also mean more risk of infections. Regular checks, trimming, and good scratching posts are just as important indoors.
Will claw trimming hurt my cat?
Not if done gently and correctly. Pick a calm time, use proper cat clippers, and give praise or treats. If they resist, stop and try again later. Building trust over time helps make claw care a regular, stress-free routine.
Are there any studies on unhealthy cat claws?
A case of worsening claws with no clear cause
A 2022 study looked at the case of a 9-year-old indoor cat, with no other health issues, who was brought to a veterinary team after five months of worsening claw problems affecting all four paws. Earlier treatments (like antibiotic injections and diluted bleach foot soaks) had failed. On examination, the claws were misshapen, splitting, and shedding, but the cat showed no signs of pain or itching, and the skin around the claws appeared normal.
The vets ran thorough tests to rule out infection or underlying disease. Results for ringworm, bacteria, viruses (FIV and FeLV), and bloodwork all came back clear. Internal scans also showed nothing unusual. A biopsy of one affected claw revealed deep pustules filled with immune cells and dead skin — not bacteria — suggesting the problem was caused by the cat’s own immune system attacking the claw roots.
A three-month course of immunosuppressive steroids was prescribed, but the condition didn’t improve. Despite allowing time for regrowth (with claw tissue growing at just under 2mm per week), there was no recovery. Fourteen months later, the claws remained the same. This was the first documented case of a chronic, widespread claw disease in cats that resisted treatment and showed no signs of healing, despite the efforts by both vet and owner.
Measuring claw growth for the first time
A recent study gave us the first precise measurements of claw growth in indoor adult cats. While it was once thought claws grew 1.9mm per week (a figure based on dogs), this study showed a slower pace in cats: front claws grow around 0.91mm per week (0.13 mm per day), while rear claws grow more slowly at about 0.56mm per week (0.08 mm per day).
Cats use their front claws more for gripping and climbing, while the back ones offer support — and that’s reflected in how fast their claws regrow. Those important front claws come back as fast as possible.
An autoimmune disease with claw complications
Pemphigus foliaceus (PF) is the most common autoimmune skin disease in cats — and it can seriously affect their claws. PF often causes crusts and pus-filled bumps on the ears, face, and feet. Around the claws, it leads to inflamed skin, thick discharge, and sometimes open sores.
Most cats with PF have symptoms in several areas and may seem itchy or unwell. A rarer form, pemphigus vulgaris, can also affect the paws but more often causes painful ulcers in the mouth and gums.
Need more information about unhealthy cat claws?
Claw care is a small thing that has a big impact. By keeping on top of regular checks and trims, you’ll help your cat stay comfortable and active. And if you’re ever unsure, your local vet team is there to support you.
Pet Health Club members enjoy six-monthly health checks and nail clipping as part of their plan. Regular visits help catch issues early and keep your cat comfortable on their paws. To find your nearest Pet Health Club practice, use our Find a vet tool.
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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS
Published on 30/12/2025 • Reviewed on 30/12/2025