There are many types of diarrhea, depending upon the age, diet, and infection. 1) Diarrhea in neonates, could be due to "lactose intolerance", which is allergy to the mother's milk, and other milk. The milk of all sources should be avoided, and lactic acid bacilli may be given, to stop the recurrence.

This video briefs about infections in toddlers causing diarrhea.