(1) Runny pus Runny pus is the most common symptom of chronic suppurative otitis media and can recur. Surgery can remove the lesion, repair the eardrum, and isolate the middle ear from the outside world to prevent the flow of pus after infection. Currently, this can be achieved through surgery in more than 90% of cases. (2) Hearing Hearing is a great concern for patients, but it is important to analyze the specific problem. In cases of conductive deafness caused by a simple decrease in middle ear sound transmission, a certain degree of improvement can be achieved through tympanoplasty and ossicular chainplasty, at least to maintain the status quo or avoid further hearing loss. However, when combined with sensorineural deafness caused by inner ear diseases such as cochlea and auditory nerve, it is difficult to completely restore hearing through surgery. (3) Cholesteatoma Cholesteatoma is not a real tumor, but a mass of squamous epithelium growing in the middle ear cavity. It can cause deafness, vertigo, facial palsy and other symptoms by destroying bone, interrupting the auditory chain, invading the vagus and involving the facial nerve. But one of the major problems that cholesteatoma needs to face is recurrence! Theoretically, as long as there are epithelial cells left in the middle ear, there is a possibility of cholesteatoma recurrence! Therefore, some foreign medical institutions routinely perform a second surgery on patients who have had cholesteatoma surgery to see if there is a recurrence of cholesteatoma in the middle ear. In China, due to the economic conditions and the limitations of the concept, there is no way to carry out the procedure routinely, and we can only rely on the patient to have regular reviews and to operate again when there is indeed a recurrence of cholesteatoma. (4) Tinnitus Tinnitus has a great impact on the quality of life of patients and can cause anxiety, insomnia, depression and other mental symptoms. There are many causes of tinnitus, and a large proportion of them are related to central nervous activity. Because the cause of tinnitus is unknown, the aim of surgical treatment of chronic suppurative otitis media does not include the elimination of tinnitus! Generally speaking, short-term tinnitus caused by local lesions may disappear through regular treatment such as cleaning the lesions and nourishing the nerves; for long-term neurological tinnitus, the efficacy of either surgery or medication is not very precise.