Could be IBS: There are some forms of irritable bowel syndrome associated with change in stool caliber. I would stoic recommend being checked out by a gastroenterologist just to be sure given your age.
Answered 5/3/2013
5.1k views
7 doctors weighed in across 3 answers
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question