An esophagoscopy provides a direct examination of the larynx. Esophagoscopy can observe diseases in the throat area as well as in the esophagus area, such as pharyngitis, laryngitis and esophageal cancer. Therefore, it can be used to examine the larynx, and it is possible to view the larynx when there is a swelling or other conditions in the larynx. Esophagoscopy allows direct observation of pharyngitis and laryngitis. For patients who have difficulty swallowing or have obstruction in the esophagus, the cause and location of the obstruction can be clarified. In addition, esophagoscopy requires fasting for more than 6 hours and fasting from food and water to avoid nausea and vomiting during the examination. If the patient has symptoms of throat discomfort, it is recommended to go to the regular hospital in time, after clarifying the cause of the disease, targeted treatment under the guidance of the doctor, in order to reduce the adverse effects of the disease.