Patients with diarrhea, stomach pain and vomiting are mostly considered to be caused by acute gastroenteritis, but also to exclude the following causes: First, gastrointestinal diseases: chronic gastritis, peptic ulcer, gastroesophageal reflux disease, gastroparesis, portal hypertensive gastropathy and gastrointestinal tumors and many other diseases can also appear the above symptoms, and patients should undergo gastroscopy to clarify the causes. Second, poor living habits: irregular diet in daily life, frequent overeating, spicy diet, staying up late, alcoholism, and taking certain drugs and other aspects can also lead to stomach pain, vomiting, diarrhea and other symptoms. Third, pregnancy: for women of childbearing age to know whether there is a pregnancy reaction. Fourth, psychological diseases: pay attention to exclude the presence of gastrointestinal neurosis and other psychological diseases caused by gastrointestinal symptoms. Fifth, other causes: there are also some patients with acute and chronic liver injury, pancreatic and gallbladder diseases, which may also have gastrointestinal reactions, so pay attention to screening. Patients should learn to decompress themselves in daily life, give warm, soft, light and easily digestible food, eat less and more often, and avoid overeating.