The process of endoscopic cleaning of cholesteatoma is usually divided into anesthesia and disinfection, exposure of the lesion location and removal, suturing and anti-infection. Cholesteatomas, also known as epidermoid cysts, can be categorized as intracranial cholesteatomas, external auditory canal cholesteatomas, and cholesteatoma otitis media depending on where they occur. Since the incidence of intracranial cholesteatoma is low, the usual cholesteatoma refers to the external auditory canal cholesteatoma and cholesteatoma otitis media, and the endoscope should refer to the otoscope, whose cleaning process is generally divided into 3 steps: 1. Anesthesia and disinfection: anesthetize the patient, expose the affected side of the ear and then disinfect the affected side of the ear and the surrounding tissues, the endoscope enters the ear with the external auditory canal to do local anesthesia under the skin of the ear. 2. Expose the lesion and remove it: the inner otoscope makes an incision in the skin and mucous membrane tissue of the external auditory canal, enters the lesion with the incision, and then removes the lesion with cholesteatoma completely. 3. Suture and anti-infection: the removed lesion is sutured, the mucosal tissue of the incision is compounded, and the ear cavity is filled with iodoform gauze. In order to prevent the patient from infection, antibiotics can be used according to the condition to prevent infection treatment. Cholesteatoma otoscopy is a kind of otorhinolaryngology treatment, if you need to carry out otoscopic surgery, you need to consult a professional physician.