Can IBS really cause thin or narrow stools, and if so, why?
Gutastrophe mentioned its because of the spasms in IBS and that is correct. The spasms, especially in the rectal area will mold your stool and shape them, the spasms can sometimes flatten them out or squeeze them into pencil-like. Understand though that narrow stools can be the sign of something else so always best to get it checked out.
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Dx: IBS 1989, Diverticulosis 2004, Idiopathic Acute Colitis 2006, UCTD 2007
Meds: Plaquenil 400mg, Chlorzoxazone 500mg, Lyrica 50mg, Protonix 40mg, Lodine XL 1000mg, Klonopin PRN, Miralax 17g, Supplements