Under normal circumstances, the pressure in the tympanic chamber is between -50 and 50 daPa, and the reason why the negative pressure in the tympanic chamber can be maintained at a normal level is because the function of the eustachian tube is at work. The patient will not experience significant discomfort. In general, there may be the following clinical situations that cause patients to experience a greater or lesser tympanic pressure: the first situation, the tympanic pressure becomes greater, some patients, for example, suddenly pinch their nose and puff, suddenly blow their nose resulting in sudden airflow into the tympanic chamber, resulting in a greater tympanic pressure, the patient will experience a feeling of stuffy ears and a thumping sound. Generally this may not be uncomfortable if it happens occasionally, but if it happens for a long time or with too much force, there is a risk of tympanic membrane perforation. The second condition, the tympanic chamber pressure becomes small, the tympanic chamber pressure becomes small clinically is very common, some patients if the pharyngeal tube is not functioning well, or the patient recently has a cold, chronic rhinitis and other reasons lead to the pharyngeal tube pharyngeal mouth blockage, will cause the pharyngeal tube edema and other changes, will lead to different pressure inside the drum, resulting in the pressure inside the patient’s drum becomes small, for a long time easily lead to negative pressure inside the drum, the drum chamber exudation thus forming a secretory The patient may experience hearing loss, ear congestion, ear pain, tinnitus, and other related changes.