The middle ear is located deep in the external auditory canal and includes the tympanic chamber, sinus, eustachian tube and mastoid process, and is adjacent to important structures such as the facial nerve, inner ear and cranial brain. Under normal circumstances, the middle ear is isolated from the outside world by the tympanic membrane, remains sterile, and plays an important role in the auditory formation mechanism. Many causes can lead to acute suppurative inflammation of the middle ear, leaving the tympanic membrane perforated, leaving the middle ear in direct communication with the bacterial external environment, which is always in a bacterial state and prone to chronic suppurative otitis media.