The redness of the baby’s body like an allergy in a large area, need to choose the treatment according to the specific cause of the disease. If the diagnosis of allergy can take anti-allergy drugs treatment. If it is eczema, etc. can be treated with topical ointment. 1. Allergy: baby body red like allergies like a large, may indeed have allergies, can follow the doctor’s instructions to take cetirizine, loratadine and other anti-allergy drugs for treatment, desensitization effect is better, but should pay attention to the choice of children’s drugs, and strictly follow the doctor’s instructions. 2. Eczema: Usually, it is a large red rash with itching, which can be effectively treated by applying glycerite lotion or weak hormonal ointment (such as Denard cream). In the baby skin abnormalities, in addition to medication, but also need to pay attention to the surface of the body clean, and appropriate adjustment of the diet to light, usually try to wear cotton loose clothing to avoid irritation of the skin and so on. The redness of the baby’s body like an allergy may also have other causes, such as folliculitis, acne, etc., it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.