Tinnitus is a physiological phenomenon that occurs at high altitude in a low-pressure environment, and is related to abnormal changes in the pressure inside the tympanic chamber, which can be restored to normal after self-adjustment by the eustachian tube. In high altitude, the outside air pressure is lower than the air pressure in the tympanic chamber, the gas in the tympanic chamber will expand, which will make the tympanic membrane and other structures slightly move to pull and stimulate the tissues in the ear, which will be manifested as a feeling of distension in the ear, as well as stuffiness, tinnitus and other manifestations, and this feeling can be balanced by the Eustachian tube to balance the air pressure between the tympanic chamber and the outside air pressure will disappear, and if the symptoms persist, they can be recovered by opening the mouth, doing chewing movements and so on. If the tinnitus symptoms persist when traveling by plane or to high altitude areas, and the measures such as opening the mouth and doing chewing are ineffective, it is possible that there is a certain inflammatory reaction in the middle ear and throat, resulting in tissue swelling and infection of the normal physiological function of the Eustachian tube. It is recommended to go to the hospital in time when the above symptoms occur.