The cause of hoarseness after gastroscopy is considered to be injury to the recurrent laryngeal nerve or the superior laryngeal nerve during operation, due to the operation of the stomach stimulation of acid reflux stimulation of the pharynx due to the operation of the stomach, in addition to suffering from pharyngeal diseases may also lead to hoarseness of voice. 1. Gastroscopy, due to the operation of the gastroscope probe in the pharynx when passing through the larynx damage to the recurrent laryngeal nerve or supraglottic laryngeal nerve, can cause hoarseness, bass, and in severe cases, can lead to the loss of voice. 2. Repeated stimulation of the esophagus and stomach during the operation of the gastroscope leads to reflux of gastric contents or stomach acid to the pharynx, which stimulates the mucous membrane of the pharynx and induces hoarseness of voice. 3. Suffer from pharyngeal diseases such as pharyngitis, due to the presence of pharyngeal mucositis, gastroscopy has a certain degree of irritation of the mucous membrane of the pharynx, so it may induce hoarseness. After gastroscopy hoarseness, it is recommended to communicate with the attending physician to clarify the cause of the disease.