Probiotics serve as diarrhea treatment by restoring the balance of microbes in the gut, states WebMD. Probiotics are used to treat diarrhea in children, diarrhea from antibiotics, travelers' diarrhea and inflammatory bowel disease.
Probiotics contain microorganisms, yeast and bacteria that reach the bowels and fight the germs responsible for the diarrhea, explains PubMed Health. Several strains of probiotic microorganisms inhibit the growth, metabolic activity and adhesion to intestinal walls of bacteria that causes diarrhea, states the Journal of Nutrition. In cases where diarrhea is caused by the use of antibiotics, probiotics help to restore the population of good bacteria, which helps with digestion, according to Harvard Health Publications.