Seven-month-old baby always scratching ears need to consider the external ear eczema, otitis media, exploratory behavior. 1. Eczema of the outer ear: it is easy to appear in the environment humid or allergic babies, manifested as itchy skin, and then the baby will keep scratching, if the scratching can be followed by bacterial infection. 2. Otitis media: if the baby has fever, cough, etc., and at the same time constantly scratching the ear, need to be alert to the presence of otitis media. 3. Exploratory behavior: seven months baby will be curious about the outside world, with the hands to sense the world, so there may be non-stop scratching ears behavior, need to cut the nails short, to avoid skin damage. Seven-month-old baby always scratching the ear may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.