Lip biting: First, there are only a few drugs which seem to be able to stop factitial or compulsive injury like this or other repetitive but purposeless activity like hair pulling, knuckle cracking, or fingernail scratching. In some cases injury can occur. First have a dental exam to make sure your "bite" or bad teeth are not a cause. If normal, then an evaluation by a mental health provider might be advised.
Answered 3/4/2014
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