The baby is biting at 11 months old and it's incredibly painful, I can…

The baby is biting at 11 months old and it's incredibly painful, I can barely get him off me, he cries out in pain, I offer everything but he doesn't want anything, he wants to bite me and that's all, he doesn't bite anyone else, he even bites his dad, but he flies over to me to leave his mark on me somewhere, and laughs, what should I do???