Like other cancers, the key to prevent and treat gastric cancer is “early”, that is, early detection, early diagnosis and early treatment. According to observation and research, it is a slow process from the beginning of cancer in a certain part of stomach tissue to the appearance of certain clinical symptoms and signs, which is a gradual process from quantitative to qualitative changes. This process is called “pre-cancer” in medical science. And this period is also the stage with the best treatment effect. Therefore, if we can pay attention to the early manifestations of gastric cancer, it is beneficial to early detection and early treatment. Therefore, if we can pay attention to the early manifestations of gastric cancer, it is conducive to early detection and early treatment, so that we can prevent the disease before it happens. Wang Jianqiang, Department of Surgical Oncology, Siping Central Hospital Most clinical and pathological workers believe that some gastric cancers can come from malignant change of gastric ulcer, but the incidence is low, and the malignant change of gastric cancer from gastric ulcer is 1%~5%. The cancer occurs at the edge of the ulcer. For chronic gastric ulcer, if the symptoms become stubborn at the age of 45 or above, and the strict medical treatment does not work after a month or so, and the fecal occult blood test turns positive at the same time, the ulcer should be considered to be cancerous, and further examination is needed to make multi-point biopsy at the edge of the ulcer to clarify the nature of the ulcer. More than 80% of patients with early symptoms of gastric cancer have epigastric pain. 2.About 1/3 of patients with early symptoms of gastric cancer have stuffy stomach, epigastric discomfort, loss of appetite, dyspepsia, accompanied by pantothenia. 3.Early symptoms of gastric cancer 1/3 patients may have unexplained weight loss, emaciation and fatigue, although they have no obvious digestive symptoms. 4.Some patients with early symptoms of gastric cancer may show symptoms such as pantothenia, heartburn, nausea, vomiting, belching or black stool. If you find any of the above symptoms in your body, please go to hospital for examination in time.