Otolaryngology diseases are mainly inflammatory diseases, such as rhinitis, pharyngitis, laryngitis and otitis media. The most common disease in otology is acute otitis media, which is mainly caused by tympanic membrane congestion and pain. Acute suppurative otitis media is characterized by perforation of tympanic membrane and massive discharge of pus. Chronic suppurative otitis media, permanent perforation of tympanic membrane, repeated pus when the body's resistance drops. Cerumen embolism, tympanic membrane perforation. The most common diseases in rhinology are chronic hypertrophic rhinitis, allergic rhinitis, deviated nasal septum, chronic sinusitis, sinus cyst, nosebleed and nasal polyps. The most common diseases in laryngology are chronic pharyngitis, acute laryngitis, acute epiglottitis, vocal cord polyp, laryngeal cancer and other diseases.