The eustachian tube is a normal physiological structure of the human nasopharynx, and its main function is to regulate the pressure of the human middle ear tympanic cavity, which can drain the secretions from the middle ear tympanic cavity and make the middle ear cavity and the nasal cavity connected. When the eustachian tube is abnormally open, it is caused by rhinitis or nasopharyngitis, nasal polyps, tonsillitis, etc., which causes edema of the mucous membrane of the eustachian tube, making the opening and closing of the mucous membrane of the eustachian tube obstructed, resulting in patients having symptoms such as fluid accumulation in the middle ear cavity, tympanic membrane invagination, hearing loss, and ear stuffiness. When the abnormal opening of the eustachian tube occurs, the symptoms of abnormal opening of the eustachian tube can be reduced to disappear after treatment of rhinitis, nasopharyngitis and tonsillitis, etc. At the same time, oral Oronema drops or Cerno can be taken to promote recovery treatment.