A small pain in the stomach can be caused by dietary factors, but it can also be caused by diseases such as gastritis and gastric ulcer. Generally the painful part of the stomach is the epigastric region or the upper left corner of the abdomen. 1. Unclean, spicy, cold, high oil factors on the gastric mucosa stimulation is very big, leading to gastric mucosal damage, so it will lead to stomach pain. In severe cases, acute gastroenteritis will also occur, with symptoms of diarrhea, abdominal pain, and even gastric mucous membrane rupture leading to bleeding, thus producing blood in the stool. 2. Chronic gastritis and gastric ulcer patients are often accompanied by stomach pain symptoms. They should consult a doctor in time and follow the doctor’s instructions to take drugs to protect the gastric mucosa, such as bismuth potassium citrate, etc.; drugs to inhibit the secretion of gastric acid, such as omeprazole. In addition, the possibility of Helicobacter pylori infection should be considered. Patients with stomach pain, should actively seek medical treatment, clear diagnosis, symptomatic treatment, so as not to delay the condition.