Chronic otitis externa is not easy to eradicate. Chronic otitis externa is mostly developed from acute otitis externa, and patients often have bad ear-pulling habits, or other triggers (diabetes mellitus, suppurative otitis media, etc.), so it is not easy to be completely cured, and requires comprehensive treatment. Chronic otitis externa is a diffuse non-specific inflammation of the skin and subcutaneous tissues of the external auditory canal, chronic otitis externa patients often have itchy and painful discomfort in the external auditory canal, rough thickening of the skin of the external auditory canal, desquamation, etc., but also can be seen narrowing of the external auditory canal, tympanic membrane cloudy thickening, marking is not clear. The general treatment of chronic otitis externa includes keeping the ear locally clean and hygienic, quitting bad habits such as ear digging, avoiding sewage into the ear as much as possible, and actively treating other causative factors (e.g., diabetes mellitus, suppurative otitis media). Topical antibiotics (e.g. levofloxacin hydrochloride ear drops, chloramphenicol cortisone ear drops) and glucocorticosteroids (e.g. dexamethasone, prednisone, etc.) can be applied. If the symptoms persist, it is recommended to consult a doctor in time to standardize the medication and treatment after clarifying the diagnosis and etiology to avoid further development of the condition.