During the summer vacation, Zhang and some colleagues went to Jiuzhaigou for a trip. Xiao Zhang was flying for the first time and saw the plane flying in the blue sky with white clouds floating under his feet, but in the blink of an eye, the plane started to descend, at which time Xiao Zhang felt pressure in both ears, followed by ear swelling and pain. Dr. Wang listened in detail to Zhang’s onset and conducted a careful ENT examination. His eardrum was found to be acutely congested, protruding, with a concave upward curve and bubbles in the tympanic membrane. The electrical audiometry examination was moderate conductive deafness, and the tympanic chamber curve was flat on acoustic impedance examination. Zhang felt strange, how could he be deaf after a flight? Dr. Wang told him that the deafness was caused by aviation otitis media due to the change in air pressure caused by the change in altitude during the flight and the inability of the eustachian tube to balance the air pressure inside and outside the middle ear. Immediately, Dr. Wang used a 7-gauge needle to puncture the front and lower part of Zhang’s eardrum under aseptic operation and withdrew 1 ml of yellowish liquid from each. Xiao Zhang immediately felt that his hearing in both ears had improved and the feeling of ear congestion was reduced. Dr. Wang then prescribed an ephedrine nasal drop, some paclitaxel and erythromycin for oral use, and told him to pay attention to no water in both ears. In a few days, Xiao Zhang was cured quickly. In fact, there is a narrow tube (medically known as the eustachian tube) in the lower part of the middle ear cavity leading to the side wall of the nasopharynx, which normally serves to balance the air pressure between the middle ear and the outside world. When people are on an airplane, as the altitude rises, the outside air pressure gradually decreases, and the pressure in the middle ear cavity is relatively high. On the other hand, when the plane is descending, the air pressure in the middle ear cavity is low, while the outside air pressure gradually increases, compressing the eustachian tube, so that the outside air cannot enter the middle ear cavity (also because of the one-way valve of the eustachian tube), which will lead to the air pressure in the middle ear cavity being lower than the outside air pressure, causing damage to the middle ear, resulting in swelling of the middle ear mucosa, increased capillary permeability, and exudation, resulting in hearing changes. So high-tech transportation aircraft can not sit? This is not true either. When you fly, you can avoid aviation otitis media by paying attention to the following points: 1. When you have a cold or nasal or nasopharyngeal disease, try not to fly; 2. This will encourage the eustachian tube to open and outside air to enter the middle ear cavity, maintain the balance of internal and external pressure, and reduce the occurrence of aviation otitis media. When aviation otitis media occurs, there will be a sudden loss of hearing, but the hearing may change when the ear screen is pressed or the head position is changed. In this case, you should go to the hospital in time to avoid aggravation and prolongation of the disease.