If the cat happens to be in the teething period, that is, when it is 4-6 months old, the bite is probably just because the teeth are growing, so it needs to grind its teeth. At this time, the owner can buy some harder dried meat or fish. Carry out feeding. If it has been biting people's hands since it was a child, it is probably because the owner often teases it with hands, causing it to treat biting hands as a habit and fun. If it suddenly turns around and bites your hand when you are petting it, it is probably because you touched a part of it that it does not like, mostly the lower body, and biting you is a warning to you.