cat bites and cries as he does it

my cat bites everyone in my family often. Usually bc he wants to play but sometimes it’s all day and random. Vet said his teeth are fine but they did barely check them out in my opinion. So I’m saving for a dental cleaning.

Sometimes he bites and cries. Has any one experienced this? It’s almost 6am, I pet him briefly when I was getting up to go to the restroom but then he just held his bite and whined.