Many cat owners trim their cat’s nails at home. Injuries can occur if you trim the nail too short and cut through the quick. The quick, the pink line you can see through your cat’s nail, is a blood vessel. When it's cut it can be painful for your cat and tends to bleed profusely. If you have styptic powder (antiseptic clotting agents that are effective at stopping bleeding) at home use it to stop the bleeding. Moisten a cotton ball and dip it in the powder. Then press the cotton ball against your cat's claw for 5 to 10 seconds.
If you do not have styptic powder, scrape your cat’s nail over top of a dry bar of soap to stop the bleeding. Another option is to pour baby powder, baking soda or flour into your hand. Then place the cat’s paw in the powder to stop the bleeding. No matter which option you choose, keep your cat still for awhile after the bleeding stops to keep it from resuming.