Really, his biting is a phase and not something that he should be punished for. He does, however, need to be taught how it hurts you and to be shown what he can do instead. When he bites you, make a big, sad, hurt face. Ouch! That hurts mommy! We don't bite mommy, we bite apples! And then you can have him help you take care of your booboo. Also, watch for the triggers and for cues that he's coming in for a nibble. When you see him starting to get overly excited, pick him up with a gentle voice (I see you're getting frustrated, too excited, overstimulated...)and tell him that he needs a time out or time alone (but not like you think!). Then take him to a quiet spot in the house (or outside or wherever is quiet) and sit with him, read a book, go for a walk, etc and help him calm down. "Time out" is a great way to show your little one now how to settle himself down by making it a pleasant and quieting experience with you, and by showing him it's ok and even fun to take some time alone when you need it. You're also showing him that you respect his emotions and his needs, and you're predicting the situations that will make him bite and avoiding it, instead of punishing him for something he hasn't much control over. You're doing a great job- good luck!!