If your child has sudden ear pain, ask for a history of other concomitant symptoms, such as pus in the ear, a history of foreign body entry, or a history of upper respiratory tract infection. It is often recommended to visit a specialist for an electro otoscopic or rigid otoscopic examination of the external ear canal and tympanic membrane. The most common type of sudden pain may be caused by a prolonged cerumen embolism squeezing the wall of the external ear canal. There is also a case of acute inflammation of the external ear canal, which may also be related to inflammatory irritation of the skin of the external ear canal caused by ear digging. If there is a recent history of upper respiratory tract infection, and then the external auditory canal as well as the tympanic membrane can be seen to be congested and red and swollen through physical examination, the possibility of acute secretory otitis media should also be considered.