Secretory otitis media is a non-suppurative inflammatory disease of the middle ear characterized by fluid accumulation in the middle ear and hearing loss, mostly in pediatric patients, and is one of the common causes of hearing loss in children. It can be caused by various factors such as dysplasia of the eustachian tube (pediatric adenoid hypertrophy, chronic sinusitis, nasopharyngeal carcinoma, dysplasia of the muscles surrounding the eustachian tube, eustachian tube cleaning and defense dysfunction), bacterial infection, immune response (reactive rhinitis, nasal polyps, bronchial asthma). Patients with the acute phase of otitis media often have a history of colds before the onset of the disease, followed by ear pain and hearing loss, which may be accompanied by a sense of self-hearing enhancement. Some patients in the chronic stage feel that their deafness worsens on cloudy days and decreases on sunny days, and their ear pain is not obvious. Preschool children show symptoms such as ignoring their parents’ calls, inattentiveness, and loud volume when watching TV. In addition, patients with secretory otitis media may also experience a feeling of occlusion or stuffiness in the ear, as well as intermittent tinnitus. In adults, when the head moves or when yawning or blowing the nose, symptoms such as the sound of air passing through water in the ear appear. In summary, secretory otitis media is a type of otitis media with a high incidence in pediatric patients.