There are many reasons for stomach discomfort, not necessarily stomach cancer: 1, food is too greasy, fried and high-fat food too much intake of the human body, will increase the burden on the stomach and intestines, it is easy to cause gastrointestinal discomforts; 2, irregular work and rest time is not normal, irregular, due to the work and study pressure, so that many people are not able to have a normal work and rest time, so overloaded work caused by the intestinal tract is too hungry or too full, which leads to abnormal operation of the intestine; 3, chewing food too fast, i.e., overeating, etc.; 4, eating unclean food causes gastroenteritis. This leads to abnormal intestinal operation, which will cause gastrointestinal discomfort in the long run; 3. Chewing food too fast, i.e. overeating, etc.; 4. Eating unclean food causing gastroenteritis, etc. Gastric cancer should be diagnosed and clinically staged by gastroscopy and CT, so it is recommended to go to regular and professional hospitals to receive examination and treatment when symptoms such as abdominal discomfort occur.