Under 2 years of age, diarrhea (commonly known as diarrhea) is more common, and diarrhea is generally defined as a change in the number of stools and or nature of stools. Parents need to briefly understand: 1, common changes in the nature of: green stool, suggesting indigestion caused; stool with mucus peptic pus and blood, often suggesting bacterial infection. 2, dietary adjustment: need to stop using milk, breast milk, etc., and switch to rice soup or porridge; 3, clean utensils: bottles, cups and utensils sterilization, adult hands need to wash hands with soap after changing diapers, rinse with running water for one more minute; 4, commonly used drugs: montmorillonite bulking (Similac (joint venture), Kentling, Beechcraft (domestic) micro-ecological regulating agents (Pepcid, Mamie’s Love (commonly used), Hershey (more expensive)) Other such as Oral rehydration salts (replenish water electrolytes, prevent dehydration)