Early sign of stomach cancer is not gastroesophageal reflux. Early stage of stomach cancer usually does not have obvious uncomfortable symptoms, and GERD symptoms such as acid reflux and heartburn, which are a kind of manifestation that may be caused by many diseases, such as gastric ulcer, chronic gastritis, etc., are not specific manifestations of stomach cancer, so it cannot be identified as early signals of stomach cancer. Therefore, it cannot be identified as an early sign of stomach cancer. Most stomach cancers are in middle and late stages, which may cause symptoms such as stomach pain, blood in stool, loss of appetite, abdominal distension, etc. Meanwhile, it may also be accompanied by systemic manifestations such as fever and weight loss, etc. If gastroesophageal reflux and the above mentioned symptoms exist for a long period of time, it is necessary to carry out gastroscopy and pathological biopsy in a timely manner, so that timely investigation of gastric cancer can be carried out and treatment can be provided.