Medically reviewed by Shadi Hamdeh, MDMedically reviewed by Shadi Hamdeh, MD The Bristol Stool Chart is used to determine whether human stool (poop) is typical, or if its shape and consistency suggest ...

Osmotic diarrhea is when undigested material reduces how much water and electrolytes the bowels can absorb. It can occur when a person’s body has difficulty digesting certain foods, such as lactose.