Four-month-old baby has ringworm-like head, is infantile seborrheic dermatitis, eczema. 1. seborrheic dermatitis: the etiology is not clear, considered with the newborn after birth sebaceous gland secretion exuberant, sebum overflow formation of greasy scales, like ringworm. 2. eczema: occurs in the baby head, face allergic skin disease, dry eczema can be seen on the surface of the skin with gray-white chaffy scales, the cause is not yet completely clear, but consider with environmental factors, genetic susceptibility, washing habits and so on. Found that the baby’s head like ringworm, try to take the baby to the hospital, let the doctor check the diagnosis and timely treatment, usually pay attention to good cleaning.