Four-month-old baby with eczema can be treated from the following aspects: 1, the use of moisturizing emollients: to be used several times in sufficient quantities, which is the basis for the treatment of eczema. 2, topical medications: topical zinc oxide ointment, glutamate lotion, glucocorticoids, topical glucocorticoids to be used according to the severity of the child’s eczema and the site, choose different dosage forms, different strength of glucocorticoids, it is recommended to choose weak or 3, oral medication: oral antihistamine medication if necessary, the recommended oral antihistamine for four-month-old babies is cetirizine. 4, do the examination: if the child’s eczema repeatedly does not heal, especially with respiratory and digestive symptoms, be alert to whether the child has milk protein allergy, if necessary, to do allergen testing, food avoidance stimulation test. Food avoidance excitation test. If it can be clear that the child is allergic to milk protein, avoid milk protein.