Sound ringing in the ear may be caused by foreign bodies in the ear canal, cerumen, secretory otitis media, and tinnitus. 1. Foreign body in the ear canal: Sound ringing in the ear can occur when there is a foreign body in the ear such as a flying insect or stagnant water. The sound will disappear after the foreign body is removed. 2. Cerumen in the ear canal: If there is cerumen in the external ear canal, such as close to the tympanic membrane, the cerumen may contact the tympanic membrane with the activity of chewing muscles or swallowing, and you may feel that there is a sound ringing in the ear. 3. Secretory otitis media: It is a non-purulent inflammation of the middle ear mainly characterized by fluid accumulation in the middle ear, hearing loss, and intact tympanic membrane. Due to fluid accumulation in the tympanic chamber, the sound in the ear may be felt as a result of the flow of fluid in the middle ear or the entry of gas into the middle ear during swallowing or activities. 4. Neurogenic tinnitus: the ear is stimulated by noise for a long time, aging, ear poison drugs, or head and face suffered trauma leading to cochlear or auditory nerve damage, tinnitus can also occur, manifested as a ringing sound in the ear. The sound in the ear is ringing, it is recommended to go to the hospital, after a clear diagnosis and treatment.