Ear drops are usually used for about 10 days. Ear drops are commonly used clinically as oxyfloxacin ear drops, lomefloxacin ear drops, boric acid alcohol ear drops, etc. These liquids are clinically applicable to otitis media, tympanitis, otitis externa and eczema of the external ear canal, etc. The effect is better. 2 drops of the above liquids are usually used for external application 3 times a day. After the treatment of ear drops for about 10 days, the symptoms can basically be relieved to disappear. While applying the ear drops, oral anti-inflammatory drugs such as cefadroxil tablets and roxithromycin are needed, and the course of oral treatment is usually one week. After the treatment of ear drops, it is necessary to keep the external ear canal clean and go to the hospital to use a professional negative pressure suction device to clean out the secretions and residual metabolic products of the external ear canal.