Chronic gastritis, peptic ulcer disease, gastroesophageal reflux disease and other upper digestive tract diseases are common and frequently-occurring diseases in outpatient department of gastroenterology. Clinically, patients often have indigestion symptoms such as dull pain in the upper abdomen, fullness, belching and anorexia. Before the onset of symptoms, there are often incentives such as improper diet, weather changes, and emotional changes. Symptoms often recur and never heal. Patients with bad stomach should pay attention to the aftercare of daily life. First of all, they should pay attention to their diet, avoid eating spicy and stimulating food, avoid drinking alcohol, avoid drinking strong tea, strong coffee and other stimulating drinks, and try to eat light, soft, warm and digestible food. Secondly, pay attention to chew slowly when eating, and eat three meals regularly and on time to avoid overeating or hunger. Thirdly, pay attention to avoid taking a large number of non-steroidal anti-inflammatory drugs such as aspirin and paracetamol for a long time, because these drugs will destroy gastric mucosa, stimulate gastric acid secretion and aggravate the original upper gastrointestinal diseases.