Narrow stools: Should I be concerned?

Narrow stools that occur on an infrequent basis are probably not an indication of a serious underlying problem. However in some cases, narrow stools — especially if pencil thin — may be a sign of narrowing or obstruction of the colon, such as due to irritable bowel syndrome or colon cancer.

Consult your doctor if you notice any changes in your bowel habits — such as narrower than normal stools — that last longer than two weeks or immediately if accompanied by rectal bleeding or severe abdominal pain.