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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

Call 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

Hogenauer C, Hammer HF. Maldigestion and malabsorption. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 10th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 104.

McQuaid KR. Approach to the patient with gastrointestinal disease. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 132.

Swartz MH. The abdomen. In: Swartz MH, ed. Textbook of Physical Diagnosis. 7th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 14.

    • Lower digestive anatomy

      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

        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: 6/21/2018

      Reviewed By: Michael M. Phillips, MD, Clinical Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David Zieve, MD, MHA, 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. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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