The main causes of early stomach pain, seen in the following points: 1, peptic ulcer, mainly in the duodenal ulcer, which is manifested in fasting epigastric pain, eating or taking drugs to inhibit gastric acid can be relieved. Mainly because of the relative excess of gastric acid in the stomach, gastric acid stimulates the ulcer surface of the mucosa and leads to early stomach pain.2, dietary factors, mainly seen in the previous day’s dinner when eating stimulating foods, such as drinking alcohol, eating chili peppers and so on. Due to the stimulation of the gastric mucosa by this kind of food at night, it can lead to early stomach pain.3, indigestion, the digestive function of the gastrointestinal tract is weakened, and the food eaten the day before can’t be completely digested, which accumulates in the stomach and stimulates the gastric mucous membrane, and leads to early stomach pain.4, environmental factors, mainly because of the cold at night when sleeping, which leads to gastrointestinal tract spasm, thus resulting in stomach pain and diarrhea.