If the child is found to have diarrhea, eczema and other allergic symptoms after eating milk powder, it is necessary to stop eating immediately, and investigate to determine the source of allergy, after confirming that the child is allergic to milk powder can be switched to amino acid milk powder, or deeply hydrolyzed protein milk powder for 4-6 months, and then switched to partially hydrolyzed protein milk powder. Replacement of milk powder should be carried out gradually according to the pediatric adaptation to milk powder, can be used in the original milk powder and new milk powder 10:1, 9:1, 8:1 ratio of gradual conversion method, maintain 3-14 days. Clinical advocate breastfeeding, help to strengthen the body resistance of children.