Hearing oneself speak loudly in the ear is called self-hearing enhancement, and is mostly seen in patients with secretory otitis media caused by dysfunction of the eustachian tube. The causes are divided into several categories: 1) mechanical obstruction of the eustachian tube, most commonly seen in children, such as hyperplasia, chronic hypertrophic rhinitis, and tumors of the nasopharynx, nasopharyngeal cancer, etc. 2) pneumatic injuries, such as diving. 3) allergic diseases, such as allergic rhinitis. 4) bacterial and viral infections, most often seen after episodes of upper respiratory tract infection or recurrent rhinitis or sinusitis. All of these causes can cause dysfunction of the eustachian tube, resulting in negative pressure in the middle ear. As the gas in the middle ear is absorbed, it causes the blood vessels in the middle ear mucosa to dilate and leak out, resulting in the formation of fluid in the middle ear and, in severe cases, hearing loss. Therefore, people with self-hearing enhancement should try to go to the hospital to find out the cause and rule out the disease for early treatment to avoid delaying the condition