Maybe: Contributing factors include stress, hormones, habits, and structural abnormalities. It would depend upon the contributing factors that other family members have in-common with your sister.
Answered 3/21/2015
5.3k views
Sometimes: There seems to be a modest genetic predisposition.
Answered 3/26/2015
3k views
10 doctors weighed in across 4 answers
6 doctors weighed in across 3 answers
5 doctors weighed in across 4 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question