Because ultrasound gastroscopy is an invasive examination, there may be a slight unpleasant sensation during the examination, but it is usually tolerable. Ultrasound gastroscopy belongs to an advanced medical device that combines ultrasound and endoscopy. It places a miniature high-frequency ultrasound probe at the front end of the endoscope, and when the endoscope enters the inner lumen, the endoscope can directly observe the morphology of the inner lumen and perform real-time ultrasound scanning, which obtains histological characteristics of the walls of the tubes at all levels and ultrasound images of the surrounding neighboring organs. The ultrasound endoscope has an additional ultrasound probe at the front end, and this small probe will follow the gastroscope and then observe the esophageal, gastric, and duodenal mucosa for inflammation, ulcers, polyps, and tumors. When the gastroscope ultrasound passes through the throat, it can irritate the throat and cause nausea and vomiting. It is especially noticeable in people who are nervous, long-term smokers, and those with sensitive throats. Some patients who cannot tolerate such pain and have good cardiorespiratory status can also opt for ultrasound endoscopy under general anesthesia as prescribed by the doctor.