Foul-smelling stools are stools with a very bad odor. They usually have to do with what you eat, but may be a sign of a medical condition.
Stools normally have an unpleasant odor, but one that is recognized as fairly common. Stools that have an extremely bad, unusual odor may be due to certain medical conditions. Foul-smelling stools also have normal causes, such as diet changes.
Does a change in your diet make the smell worse or better?
What other symptoms do you have?
The doctor may take a stool sample. Other tests may be needed.
Proctor DD. Approach to the patient with gastrointestinal disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 134.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.