Nipple biting and general biting

So my little one has 6 teeth and he’s been biting me like crazy.

He doesn’t bite so often while nursing (I know to stop nursing after he bites for a bit and say ouch and that hurts mommy ) but today he bit me HARD and pulled his head back leaving my nipple bleeding and likely bruised(this just happened)

But he’s biting like all the time when he’s playing and stuff. He’ll kinda suck and nibble on my arms and hands (he used to do that when he was tooth free and teething) but he’ll bite HARD.

How do I get him to stop?