Diarrhea is characterized by frequent and loose or watery stools. It is sometimes the result of allergies or sensitivity to spicy foods or dairy products, contaminated water or food, a change in activity level, or viral, bacterial, and parasitic infections. Among MS patients, diarrhea is less prevalent than constipation but is still a problem. A reduced sensation in the rectal area allows the rectum to stretch beyond its normal range. This triggers an unexpected, involuntary relaxation of the external anal sphincter, releasing loose stool.
Diarrhea can be the signal of another problem.
If it becomes frequent or continual, see your doctor. The information provided by The Cleveland Clinic is not intended to replace the medical advice of your doctor or health-care provider. Please consult your health-care provider for advice about a specific medical condition. All rights reserved. All rights reserved.