The following diseases are common in the clinic, and the treatment of each disease is as follows. 1. purulent otitis media, the patient shows yellow purulent secretions in the ear canal, clinically this case first go to the hospital, the doctor with hydrogen peroxide to clean the ear canal treatment, wash clean and then use levofloxacin ear drops to give ear bath treatment. 2. Some patients have eczema in the external ear canal, which is mainly characterized by itchy ears and yellow water, and can be treated clinically with oral antihistamines and anti-allergy ointment in the ear canal. 3. Cranial pressure lowering treatment should be carried out and the ear canal should be kept clear to avoid retrograde infection.