In our usual outpatient clinics, we often encounter children who come to the clinic with symptoms such as suddenly feeling stuffy in the ear, listening to sounds very softly, or feeling strange sounds in the ear; or children who do not have any complaints, while parents find that their children often cry out for help and watch TV with the sound turned up very loudly. Through a series of examinations such as acoustic conductance, electrical audiometry, brainstem evoked potentials, or CT scans of the ear, we can find the accumulation of fluid in the middle ear drum of these children, which is clinically diagnosed as secretory otitis media. The cause may be the sequelae of acute otitis media, recurrent otitis media, adenoid hypertrophy, nasal polyps, or sinusitis blocking the eustachian tube. In the past, there were opinions that no treatment was needed for pediatric otitis media and that it often healed on its own after a few months. However, according to our clinical experience, if certain adjuvant treatment is given, it can shorten the healing time and significantly improve the symptoms. In general, children, especially preschoolers, have poor resistance and are prone to respiratory infections, which if left untreated can cause changes in the quality of the tympanic membrane or cause permanent hearing loss. Therefore, in the outpatient clinic we usually give topical nasal drops, or nasal sprays, which can significantly reduce the swelling of the nasal mucosa, reduce the secretions in the nasal cavity, and help the reopening of the eustachian tube, oral anti-allergy drugs, which can reduce the swelling of the eustachian tube and the further production of secretory fluid, and others, such as mucus diluents, which can also dilute the fluid in the tympanic chamber and promote fluid absorption and elimination. If there is still fluid in the middle ear for 2-3 months after outpatient treatment, we recommend that a tympanic puncture should be performed in a timely manner to extract the fluid and place a ventilation tube, otherwise, too much time will easily lead to atrophy of the tympanic membrane, thinning, formation of calcified spots, or adhesions in the tympanic chamber, or worse, permanent hearing loss due to absorption of toxic substances from the exuded fluid. As for the ventilation tube, it usually falls off on its own between six months and a year, so just pay attention to the postoperative follow-up. If the adenoids or nasal polyps are blocking the eustachian tube, surgery for adenoids and nasal polyps should be performed.