Will chronic suppurative otitis media come back again and again after surgery? What should I do if my hearing never gets better? In fact, the chance of recurrence of chronic suppurative otitis media is very low. As long as the surgery goes well, the postoperative cleaning is proper, and the function of the eustachian tube is normal, the recovery is generally good. If the function of the eustachian tube cannot be restored, it may affect the post-operative results, the tympanic membrane will be invaginated, and the symptoms will be manifested as insignificant hearing improvement and ear stuffiness. Eustachian tube function can be restored in some patients through routine postoperative medication and eustachian tube function exercises. If conservative treatment is still ineffective, pharyngeal balloon dilation technique can be tried. For poor postoperative recovery or recurrence of disease due to pharyngeal dysfunction, pharyngeal balloon dilation can be used to help restore pharyngeal function. The eustachian tube balloon dilation technique originates from Germany and aims to improve the opening of the eustachian tube by briefly dilating the eustachian tube, facilitating the drainage of mucus accumulated in the tube, and facilitating the regulation of the opening and closing of the eustachian tube. Specifically, the procedure requires general anesthesia and is performed by entering the dilation through the nasal cavity, which is generally narrower in children and can be performed through the combined oral-nasal cavity. Then, a microballoon is pushed into the cartilaginous segment of the eustachian tube through the passage created by the device, and water is pumped into the balloon with a micro-pump to generate a pressure of approximately 10 bar against the eustachian tube, which is then maintained for 2 minutes, and finally the balloon is withdrawn together with the device. The balloon is used only once, and the cost of this consumable is high, about 15,000, and it cannot be reused, and together with other costs of the procedure, the cost of unilateral balloon dilation of the eustachian tube is about 15-20,000. In foreign countries, this technique is mostly used for recurrent secretory otitis media, and 60% to 70% of patients have good postoperative results; it can also be used for patients with ear stuffiness caused by eustachian tube dysfunction; or patients with poor recovery of eustachian tube function after surgery for otitis media. More than 80% of patients with eustachian tube dysfunction achieve improvement. If eustachian tube dysfunction is found during the preoperative evaluation of a patient with otitis media, balloon dilation can be performed at the same time as otitis media surgery to avoid secondary anesthesia; and if the patient still has postoperative manifestations such as ear stuffiness and tympanic membrane invagination, it is mostly due to failure to improve eustachian tube function, and if conservative treatment is ineffective, balloon dilation of the eustachian tube can be considered. According to a German clinical study, some patients need more than 2 dilation sessions to achieve relatively stable results.