Early stage stomach cancer patients usually have inconspicuous symptoms and may experience symptoms such as fullness and discomfort, indigestion and epigastric pain. Cancer cells of stomach cancer usually originate from gastric mucous membrane cells, and the cause of the disease is usually related to infection factors, genetic factors, environment and dietary factors, etc. The main symptom is abdominal pain. The main symptom is abdominal pain. However, in the early stage, there are usually no symptoms and manifestations, and some stomach cancer patients may have minor discomfort such as fullness, indigestion and epigastric pain, which are usually confused with common gastritis and not easy to pay attention to. With the development of the disease, stomach cancer patients will also suffer from epigastric pain, weight loss, anorexia and vomiting of blood, and sometimes there will be concomitant symptoms such as dysphagia, nausea and vomiting, etc. In the final stage of the disease, patients will suffer from severe wasting and malignant symptoms. If someone in the family suffers from stomach cancer, he/she should go to the hospital for regular checkups to exclude the possibility of stomach cancer. Gastric cancer patients should pay attention to the rationality of diet, ensure balanced diet, replenish nutrients for the body, and avoid overeating or dieting or fasting.