It’s perfectly normal to sometimes see some undigested food in your stool. But if you have other symptoms, it might be a sign of a health problem. Is It Normal to Have Undigested Food in Your Stool?

Foul-smelling stool has a putrid and rotten odor. Usually, this smell is from foods that people eat. Sometimes though, foul-smelling stool can indicate health problem, such as an infection, an allergy ...