Previously, due to the limitations of medical technology, most patients with chronic otitis media and cholesteatoma-type otitis media were treated conservatively with medication. If surgery was really needed, it had to be performed only after the flow of pus had stopped for more than six months, otherwise the surgical effect would be affected. Nowadays, due to the development of microscopic otology technology, patients with recurrent chronic otitis media can undergo surgery even during the suppurative stage, without having to worry about whether or not the flow of pus will affect the outcome of the surgery.