Stools are formed in the large intestine (colon), which is part of the digestive system. Normally, “good bacteria” live in your large intestine and help digest or break down the food remnants that enter the large intestine from the small intestine. Stools are formed during this process. Stools are passed through the large intestine to the rectum for elimination from the body. The normal, unpleasant smell associated with stools is a result of the bacteria.

Changes in stool odor can be caused by the foods you eat. Even extremely foul-smelling stools can be due to changes in your diet. However, abnormally foul-smelling stools may also be a sign of a disease, disorder or condition. Examples include celiac disease, Crohn’s disease, cystic fibrosis, and intestinal infections. Because of the range of possible causes of bad stool odor, a correct diagnosis of the underlying disease, disorder or condition is very important. Book an appointment with one of our doctors for a physical exam.