OH My daughter 15 months old has started to bite me, when she is so angry she usually grinds her teeth so much. I also had little teeth marks over my arms,legs, and my fingers. She usually do it when she is hungry or when the usual tandrums hit. I always ignore her, so she will never return, or if i shout or reply to her she will do it again and again, so better to ignore. and it really works
HTH
cheers