The purpose of this study was to observe the natural progression of untreated syphilis in rural African-American men in Alabama under the guise of receiving free health care from the United States government.
1 Diarrhea is caused by increased secretion of fluid into the intestine, reduced absorption of fluid from the intestine or rapid passage of stool through the intestine.  Symptoms associated with diarrhea include abdominal pain, especially cramping. Other symptoms depend on the cause of the diarrhea.
That's when a more serious problem is probably responsible. Your doctor can ferret out the cause. See a doctor for your diarrhea if: 1  You see blood in your stool. 2  You experience symptoms of dehydration, including dizziness when you stand up, scanty and deep-yellow urine, increased thirst, and dry skin. 3  Children may also cry without producing tears.