Eustachian tube abnormal opening
The eustachian tube of the eustachian tube is normally closed, and it is opened only momentarily when swallowing, yawning, opening the mouth, and blowing the nose to perform gas exchange in the tympanic cavity. Such as parapharyngeal muscle paralysis, atrophy, can make the pharynx often open and produce symptoms, called eustachian tube abnormal opening.
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