The reasons for the recurrence of eczema in babies are considered to be related to poor skin barrier function, genetic factors and triggering factors. 1. Poor skin barrier function: baby’s skin is usually weak, the surface of the stratum corneum structure is abnormal, the water content decreases, the sebum content decreases, will cause the skin protection ability to decline, and then appear eczema symptoms. 2. Genetic factors: parents with a history of allergic diseases, such as allergic asthma, allergic rhinitis, etc., then the baby is also very easy to allergic skin disease, this time to consider atopic dermatitis, manifested as recurrent eczema-like changes, and easy to combine with asthma, allergic rhinitis, conjunctivitis. 3. Triggering factors: when the baby just added complementary foods, may be due to eggs, milk, seafood, mango and other food allergies, thus inducing pediatric eczema. Inappropriate material of intimate apparel, inhalation of house dust mites, external environmental stimuli, etc., may induce recurrent episodes of eczema in babies. It is recommended to determine the baby eczema, need to identify the cause as soon as possible, and give the triggers to remove, at the same time to cooperate with the doctor standardized treatment.