Video answer: This is why cats bite you sometimes when you pet them
Top best answers to the question «Why do cats suddenly bite you»
If your cat is suddenly biting you when they haven't before, it is most likely pain-related. Cats are experts at hiding pain, so he may not show you any other signs that he's hurting… Cats are stressed when they are hiding constantly, over-grooming, not using the litter box, hissing or growling, or even trying to bite.
Video answer: Why cats sometimes bite you & other strange behaviors explained