Abdominal pain during the day and improvement at night may be related to dietary factors and gastritis. 1. Dietary factors: eating more during the day, may eat more messy, such as eating too much cold, spicy and irritating food, resulting in gastrointestinal mucosal stimulation, thus causing pain, stop eating at night, the symptoms have been relieved. 2. Gastritis: mostly seen in chronic gastritis, itself stimulated by inflammation, resulting in damage to the gastric mucosa, increased secretion of gastric acid, may be affected by eating during the day, the secretion of gastric acid will increase, the gastric mucosa caused by stimulation, resulting in gastric pain, the stomach rest at night may be better. Abdominal pain during the day and night, the situation improves, in the daytime to adjust the diet, to light and easy to digest food, and to eat small meals.