Depends: What are you eating? What medicines are you taking? Any other symptoms? General health? Any parasites? Or unusual travel. See pcp or GI to have a stool sample examined.
Answered 6/10/2014
4.3k views
Medicine may do it: Bismuth can sometimes color stool--usually grey. Diseases that affect the intestine may cause blood to be in the stool, or the stool to be black. Infections and parasites cause changes that need to be seen under a microscope, not the changes that you describe. Try stopping the pepto bismol (bismuth subsalicylate) to see if the white chunks disappear.
Answered 11/28/2017
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