The condition of eczema all over the body of a four-month-old baby can be relieved by general treatment, topical medication and oral medication. 1. General treatment: (1) Parents need to dress their children in cotton, loose, breathable clothing and change and wash them frequently. (2) Avoid scalding and scrubbing when bathing, and reduce the frequency of using shower gel or soap to avoid irritation. (3) At the same time, we should pay attention to strengthening the basic moisturizing of the local skin, reasonable use of moisturizing emollients, to prevent local dryness and flaking, resulting in damage to the skin barrier, aggravating eczema. 2. Topical drugs: four months after the baby appeared all over the body eczema, you can in the basic moisturizing skin care on the basis of topical hydrocortisone, mometasone furoate and other ointments coated with treatment. 3. Oral medication: If necessary, you can follow the doctor’s instructions to choose suitable for infants and young children oral antihistamine treatment, be sure to strictly in accordance with the instructions or follow the doctor’s instructions to use the drug, do not take the drug without authorization. If a four-month-old baby is diagnosed with eczema, it is recommended that standardized treatment be carried out as soon as possible to reduce the adverse effects of the disease.