Glossary
Dewclaw
The small thumb-like claw higher up on the inner side of each front leg that does not touch the ground.
Also called: dew claw, thumb claw, cat thumb
A dewclaw is a small extra digit, rather like a thumb, found a little way up the inside of a cat's front leg. Most cats have one on each front paw, which makes five toes at the front and four at the back. The dewclaw sits above the other toes and usually does not reach the ground when the cat walks.
Because it seldom touches a surface, the dewclaw wears down less than the other claws. The cat can still use it to grip prey and to steady itself while climbing. Cats also tend to keep the nail trimmed by chewing it, but older cats, and cats that scratch little, sometimes stop.
Check the dewclaw whenever you trim nails. A neglected claw can curl round and grow into the soft skin beneath it, which is painful and can lead to infection. Signs include limping, licking at the leg, redness or swelling near the claw. Ask your vet to deal with an ingrown claw, and have them show you how to trim safely. Cats with extra toes, see polydactyl, may need more regular checks.
Last reviewed November 7, 2026