The reasons why a cat suddenly hugs you and bites you:

1. It may be expressing its anger by biting you. Ask the owner to immediately stop some behaviors that may cross the cat's bottom line.

2. A cat biting you may also mean that it is unhappy or angry and expressing dissatisfaction. When a cat is in a bad mood, it may bite its owner's hand to relieve it.

3. Frequently teasing the cat and taking the joke too far arouses the cat’s desire to win and makes the cat think it is provoking it.

4. The cat feels hungry, and it deliberately harasses the owner to pay attention to it, so that the owner will remember to feed it food.

5. It is also possible that the cat is expressing love. The cat holds the owner's hand and suddenly starts to bite the owner. It may be because it likes you very much, which means that the cat trusts you very much and is using its own way to express love to you. You show your love by licking and biting your fingers just as he licks his fur.

6. A cat biting your hand may also mean that it wants to play with its owner. When a cat is too bored, it will look for its owner and want the owner to play with it. If the owner ignores it, it will hold your finger and bite it, as if it treats your hand as a toy, and the more it bites, the harder it will go.