The stomach pain is usually caused by gastric ulcer, gastroenteritis, gastric cancer, gastritis and other factors, so you can go to the hospital in time for relevant examinations to make a clear diagnosis and give appropriate treatment for different diseases. 1. gastric ulcer: gastric acid secretion is caused after eating, and if too much gastric acid is secreted, it will stimulate the gastric mucosa and cause gastric ulcer and stomach pain, and the pain is regular, and the location of the pain is more obvious in the middle and upper part of the abdomen. The pain is more obvious in the upper part of the abdomen, accompanied by nausea, vomiting and other symptoms. Treatment needs to be given to the gastric mucosa protective drugs, such as aluminum thioglycollate, bismuth, etc., and also to reduce the intake of stimulating food and strong tea, coffee, so as not to aggravate the disease; 2, gastritis: patients can appear after eating a long period of bloating pain, accompanied by bloating, belching, weight loss and other symptoms. Need to maintain good habits, healthy regular diet, you can choose gastric mucosa protective agent such as thioglycollate aluminum to relieve symptoms, if combined with Helicobacter pylori infection, you need to take four drugs for treatment; 3, enteritis: if the diet is unclean, eating cold or spicy irritating food that will attack or accompanied by abdominal pain, diarrhea attacks, can be considered as the possibility of enteritis. Generally, it can be cured by itself within a short time after rehydration diet and medication, while acidosis and electrolyte disorder need to be corrected in severe cases; 4.Stomach cancer: if the pain in stomach is more serious after eating, accompanied by nausea, vomiting, vomiting blood and other symptoms, you should be alert to the occurrence of stomach cancer. Gastroscopy and PET-CT examination should be performed in time, and timely surgery should be performed after diagnosis to remove the cancerous lesions, cooperate with radiotherapy and chemotherapy to improve survival rate, use parenteral nutrition such as infusion of glucose and vitamins to supplement energy, and apply painkillers such as diazoxide to relieve pain and guarantee survival quality; 5.Other: such as common bile duct stones, pancreatitis, cholecystitis, etc., epigastric pain may appear, which is obvious after eating, and may also be manifested as Gastroparesis-like changes, need to improve the abdominal ultrasound and abdominal CT to further clarify the diagnosis, and then symptomatic treatment.