The right ear can not hear the sound, belongs to deafness, can be divided into conductive deafness, sensorineural deafness, mixed deafness. 1. Conductive deafness: It refers to the hearing impairment caused by the pathway of external sound transmission to the inner ear being obstructed due to the lesion of the outer ear or middle ear. Diseases that cause conductive deafness include cerumen impaction, atresia, inflammation of the outer ear canal, otitis media, middle ear tumor, tympanic membrane trauma, and auditory ossicle chain fracture caused by ear trauma. 2. Sensorineural deafness: it refers to the damage of the auditory nerve, auditory conduction pathway or neurons at all levels, resulting in deafness caused by the obstacle of sound perception and nerve impulse transmission, resulting in sensorineural deafness diseases are: (1) Congenital deafness caused by viral infectious diseases or delivery factors in early pregnancy of the mother; (2) Age-related deafness caused by the aging of the hearing organs as the age increases; (3) Drug-induced deafness caused by the use of ototoxic drugs that damage the vascular stripe and blood-labyrinth barrier after entering the inner ear. (4) Infections caused by brain flu, scarlet fever, diphtheria, typhoid fever and other infections can damage the inner ear and cause infectious deafness. (5) Hereditary deafness secondary to genetic or chromosomal abnormalities and other genetic defects. 3. Mixed deafness: refers to both conductive deafness and sensorineural deafness. The causes of deafness are complex, and it is important to go to the hospital in a timely manner to clarify the cause of deafness and actively treat it.