Stomach cancer will show symptoms of stomach acidity and heartburn, but these symptoms are not necessarily caused by stomach cancer, but may also be caused by other diseases, such as gastrointestinal dysfunction, gastritis, gastric ulcer, duodenal ulcer, etc. When symptoms appear, one should determine whether there is any discomfort elsewhere in the body. In the early stage of stomach cancer, the symptoms are not particularly obvious. In addition to the burning sensation behind the sternum and acid reflux, patients may also have upper abdominal discomfort, and the pain may be aggravated especially after eating. It may also be accompanied by nausea, vomiting, hiccups, lack of appetite, anemia, etc. Patients may also have sudden weight loss, dark stools and bleeding stools. When these symptoms appear, the possibility of gastric cancer is high and it is necessary to go to hospital for examination. Early gastric cancer has better effect after treatment, so it is necessary to have early examination and actively cooperate with the doctor’s treatment.