1, clean in moderation, do not pursue sterility. 2, careful use of antibiotics and other drugs that destroy the intestinal environment. 3, the best age to choose the best food, especially within one year. Do not eat egg whites, do not drink fresh milk do not eat fresh milk products such as cake] ice cream, etc. Can not eat soy and peanuts, can not eat seafood with hard shells. 4. Lifestyle is more harmful than genetic inheritance. Block allergy trilogy: digestive tract allergy – skin, eczema – respiratory tract, asthma, etc. The gastrointestinal tract is the largest immune organ in the body, so it is important to take care of the spleen and stomach. Diaper rash can be secondary to fungal or bacterial infections.