The baby always pats the ear with mosquito bites, external ear canal foreign body, external ear canal eczema or other diseases. 1. Mosquito bites: when the baby’s ear area by mosquito bites, can be due to local skin itching and the phenomenon of always patting the ear. Some babies may also have other symptoms such as redness, swelling and pain in the ear area. 2. Foreign body in the external auditory canal: when the baby’s external auditory canal into the grain, insects, stones and other foreign objects, may cause irritation to the local mucosa, which is manifested as severe ear pain, ear itching, ear stuffiness and swelling, etc., the baby may also be because of the discomfort of the ear and always patting the ear. 3. Eczema of the external auditory canal: the etiology of eczema of the external auditory canal is not completely clear, may be associated with perverse reactions, psychological factors, neurological dysfunction. Eczema of the external auditory canal will cause local skin itching, burning sensation, lesions can be erythematous or corn-shaped papules, small blisters, epidermal flaking, cracking, etc., can also cause babies to appear always patting the ear phenomenon. 4. Other diseases: otitis media, cerumen impaction of the external auditory canal, otitis externa and other ear diseases can also cause discomfort in the baby’s ear, which is manifested as a total ear patting. The baby always tapping ears, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.