Several reasons: Could be muscle problem, nerve root irritation, bad mother-in-law. Sorry couldn't resist. I love my mother-in-law. Maybe time to see your doc for it to be evaluated.
Answered 4/1/2014
4.5k views
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question