Puppies bite. Their teeth coming in must be awfully annoying and the gums
must hurt them terribly. Your puppy is not biting you to be mean it's a
natural thing for them to do. You need to have patience and teach him
no biting. My daughter's Min-Pin had the sharpest teeth I have ever felt.
He drew blood daily on my hands. They were needles. This will pass.
Everytime he goes for your hands, tell him no biting by Gently holding his
mouth closed then immediately give him one of his bones to chew on or
better yet a treat bone. Don't use his crate for punishment. He's adorable
and just wants to be a puppy and play, bite, poop and pee.

That's what
makes a puppy a puppy. I promise his biting will stop once those baby teeth are in. Remember, say gently no biting while holding his mouth
closed for a second, letting him know it's wrong and you still love him.
You;ll see, it works, just be patient.