5-month-old baby always scratching ears consider play, otitis media, external ear canal eczema and so on. 1. Playing: 5-month-old babies are still relatively small and can’t express themselves. If the baby’s mental state is relatively good, there is no crying or other discomfort, and his diet is relatively good, consider that he is playing. 2. otitis media: otitis media is an inflammation of the middle ear caused by bacteria or viruses, partly induced by colds and other causes, the baby will have symptoms of earache, so always scratching the ear, if it is purulent otitis media will also appear in the ear canal secretion increased symptoms. 3. Eczema of the external auditory canal: Eczema of the external auditory canal is common in children, is a perverse inflammation of the ear area, there will be symptoms of itching, and some will be accompanied by flaking, oozing and crusting. 5 months baby always scratching the ear may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.