What are the symptoms of the three early signs of stomach cancer? I. Stomach discomfort symptoms such as stomach pain, bloating, acid reflux, heartburn, etc., which are relieved after dietary adjustment and symptomatic treatment, are often neglected. Therefore, when the above symptoms occur for a long time and recurrently, attention must be paid to them and timely visit a hospital, and gastroscopy can assist in diagnosis. Second, unexplained loss of appetite, gastric distension, the effect of symptomatic treatment is not good and lasts for a long time, this situation should be taken seriously, timely gastroscopy to avoid delay. Third, if you have stomach pain, stomach distension and other discomfort, accompanied by weakness, weight loss and other symptoms, you should perform gastroscopy, blood routine, tumor markers and other tests to clarify the diagnosis. Therefore, it is important to pay attention to the symptoms when they last for a long time and perform gastroscopy in time to avoid delaying the disease. If gastric cancer is detected, diagnosed and treated early, the prognosis is relatively good; if it is detected late and has no chance of surgical treatment, the prognosis is relatively poor.