Some patients with gastric cancer may not always cause pain. Some patients with early stage gastric cancer may have no symptoms, or may have mild symptoms, such as discomfort in the upper abdomen and subxiphoid process, occasional acid reflux and hiccups, etc., but they are non-specific and easily ignored by individuals. With the development of the disease, abdominal pain may appear only in the middle and late stages, mainly manifested as pain under the glabella or in the upper abdomen, which may be mild or severe and the location is not fixed, and may be accompanied by acid reflux, hiccups and other symptoms. If the tumor continues to develop and causes blockage in the digestive tract, obstruction or vomiting after eating may occur. Therefore, not every patient with gastric cancer will have pain, on the contrary, it is clinically found that more patients do not have pain in the early stage.