Two-year-old Lanlan is very cute, smart and cute, and very cute. However, recently, her parents found that her hearing seemed to be worse than before, and she did not agree to be called from a distance. After the doctor’s examination, it was found that Lan Lan had non-suppurative otitis media. Non-suppurative otitis media, also known as secretory otitis media, can be caused by a variety of reasons, such as acute upper respiratory tract infection, nasal or nasopharyngeal diseases (rhinitis, adenoid hypertrophy of the nasopharynx), and allergic reactions, which can lead to obstruction of the eustachian tube. The eustachian tube is a tube between the human nasopharynx and the middle ear cavity. If the mucous membrane of the eustachian tube is swollen and the tube lumen is obstructed, resulting in poor ventilation and drainage of the middle ear, it can cause fluid accumulation in the middle ear and lead to the development of non-suppurative otitis media. While pediatric otitis media with pus flow is easily detected by adults, secretory otitis media is often overlooked because there is no pus flow and no obvious systemic symptoms such as ear pain or fever, except for hearing loss of varying degrees, and because the child does not complain about the condition. If otitis media is detected early and treated promptly, the treatment will be effective; if it is delayed for a long time, the tympanic membrane may become trapped and the middle ear may become adherent, which will directly affect the child’s hearing and bring some difficulties to his future life and work. To prevent otitis media, the main thing is to actively prevent and treat acute upper respiratory tract infections and nasal and nasopharyngeal diseases in children. We should pay attention to strengthening the child’s nutrition and resistance, and increase and decrease clothes when the weather changes to prevent cold and flu. Once you find that your child has dull hearing, mishearing, inattentiveness, or older children complaining of stuffiness and blockage in the ears, you should take your child to the hospital for examination in time to prevent delaying the diagnosis and treatment. In the early stage of the disease, the mucous membrane of the nasal cavity and the eustachian tube can be contracted through active anti-inflammatory and anti-allergic treatment and local spraying of the nasal cavity to facilitate the ventilation and drainage of the middle ear; in severe cases, the middle ear cavity can be punctured or incised and the tube can be placed, which can generally be cured.