Cats may bite people or other animals because they have some internal motivation, or they may be giving a warning or protecting themselves. Cats may also bite people or other animals because they are playing or training, without any malicious intent. Before determining the cause, you need to carefully observe when your cat bites you, whether it is playing or giving a warning, and whether you are engaging in any behavior that may cause your cat to become upset.
If your cat keeps biting you, or you're not sure why it bites you, the best thing to do is to talk to a A professional pet behavior consultant or veterinarian. They can help you understand your cat's behavior and provide advice to help you solve the problem.