Gastroenteritis causes digestive tract dysfunction and is the main cause of this symptom. Consumption of unclean food or cold in the abdomen can cause bacterial infection in the intestine and lead to intestinal inflammation. It will stimulate the intestinal mucosa and strengthen the peristaltic performance of the intestines, resulting in excessive secretion of gastric acid and digestive tract dysfunction, leading to indigestion and stomach discomfort in the morning, nausea and regurgitation. In this case, you should take oral medications such as morpholine and digestive aids such as stomachic tablets for treatment. Pay attention to keep warm, pay attention to a light diet, do not eat spicy and stimulating food, and ensure sufficient sleep. If you have pain, you should consume drugs like Daxil that have pain-relieving and protective effects on the gastric mucosa. If the symptoms are not relieved after persisting for a few days, it is recommended to go to the hospital for examination and treatment in time.