Abnormal opening of the tympanic duct is not difficult to diagnose based on history and signs. Those with incomplete closure and intermittent symptoms are more difficult to diagnose, but acoustic conductance examination is feasible, and wave-shaped conductance maps can be detected during forceful whistling. The abnormal opening of the eustachian tube is a symptom caused by the eustachian tube being excessively open or frequently open. It is most common in adults. The cause is unknown, but is generally thought to be related to atrophy of the lymphatic tissue or fat pad surrounding the pharyngeal cartilage. The tympanic membrane agitation and ringing in the ear synchronized with inspiration are its clinical features. Etiology 1, soft tissue defects around the pharyngeal opening of the eustachian tube, scar adhesions, atrophy and muscle paralysis, etc. Drug application method: chemical erosion agent is applied to the pharyngeal opening of the eustachian tube through the eustachian tube duct to produce scars in the eustachian tube and reduce the size of the eustachian tube opening. 2, commonly used drugs are 10% to 20% silver nitrate, 5% to 10% trichloroacetic acid and 5% carbolic acid, etc. Sclerosing agent or silicone injection method: Sclerosing agent, silicone and autologous serum are injected into the submucosa of the pharyngeal opening of the eustachian tube to narrow the opening. Electrocoagulation method: The pharyngeal opening of the eustachian tube is electrocoagulated through an insulated eustachian tube catheter. 3.Implantation of middle ear ventilation tube: Some scholars implant middle ear ventilation tube through the tympanic incision to balance the pressure inside and outside the tympanic membrane, and the symptoms can be relieved or disappear.