Browse A-Z

 
E-mail Form
Email Results

 
 
Print-Friendly
Bookmarks
bookmarks-menu

Stools - foul smelling

Foul-smelling stools; Malodorous stools

Foul-smelling stools are stools with a very bad odor. They very often have to do with what you eat, but may be a sign of a medical condition.

Considerations

Stools normally have an unpleasant odor. Most of the time, the odor is familiar. Stools that have an extremely bad, abnormal odor may be due to certain medical conditions. Foul-smelling stools also have normal causes, such as diet changes.

Causes

Causes may include:

Home Care

Home care depends on what is causing the problem. Things you can do include:

  • Follow your health care provider's instructions.
  • If you have been given a special diet, stick to it closely.
  • If you have diarrhea, drink more fluids so you do not get dehydrated.

When to Contact a Medical Professional

Contact your provider if you have:

  • Black or pale stools often
  • Blood in the stool
  • Changes in the stool related to diet
  • Chills
  • Cramping
  • Fever
  • Pain in the abdomen
  • Weight loss

What to Expect at Your Office Visit

Your provider will perform a physical exam and ask about your medical history. Questions may include:

  • When did you first notice the change?
  • Are the stools an abnormal color (such as pale or clay-colored stools)?
  • Are the stools black (melena)?
  • Are your stools hard to flush?
  • What sort of diet have you eaten recently?
  • Does a change in your diet make the smell worse or better?
  • What other symptoms do you have?

The provider may take a stool sample. Other tests may be needed.

References

Höegenauer C, Hammer HF. Maldigestion and malabsorption. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 11th ed. Philadelphia, PA: Elsevier; 2021:chap 104.

Nash TE, Hill DR. Giardiasis. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 330.

Text only

  • Lower digestive anatomy - illustration

    Food passes from the stomach into the small intestine. In the small intestine all nutrient absorption occurs. Whatever has not been absorbed by the small intestine passes into the colon. In the colon most of the water is absorbed from the food residue. The residue is then eliminated from the body as feces.

    Lower digestive anatomy

    illustration

  • Lower digestive anatomy - illustration

    Food passes from the stomach into the small intestine. In the small intestine all nutrient absorption occurs. Whatever has not been absorbed by the small intestine passes into the colon. In the colon most of the water is absorbed from the food residue. The residue is then eliminated from the body as feces.

    Lower digestive anatomy

    illustration


 

Review Date: 7/30/2022

Reviewed By: Michael M. Phillips, MD, Emeritus Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
© 1997- adam.com All rights reserved.

 
 
 

 

 

A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.
Content is best viewed in IE9 or above, Firefox and Google Chrome browser.