Prevention and treatment of conductive deafness 1. Active treatment of various external and middle ear diseases that cause conductive deafness, about 70-80% of conductive deafness and some mixed deafness can be brought to a practical level of hearing through skilled otologic surgery. 2. Those who are bilaterally conductive deaf and cannot be operated for various reasons, or surgery is not expected to improve their hearing, can wear appropriate hearing aids. 3.Actively prevent and treat pediatric secretory otitis media. 4. Carefully treat nasal, sinus and nasopharyngeal diseases. Prevention and treatment of sensorineural deafness The prevention and treatment of sensorineural deafness is still the biggest problem in the current otology field. Among all sensorineural deafness, except for a very small number of diseases such as idiopathic sudden deafness, which may recover spontaneously or through timely and appropriate treatment, it is possible to improve hearing to partial or total recovery.