Children’s stomach pain in the evening can be caused by autonomic dysfunction, functional dyspepsia and acute gastroenteritis. 1. Autonomic dysfunction: when the pressure of daily study is too great and negative emotions are too much, intestinal dysfunction can occur, which leads to spasmodic intestinal contraction, causing stomach pain. 2. Functional dyspepsia: it is often caused by eating too much food at lunch, especially consuming more high-fat and greasy food, or eating too many snacks in the afternoon, which may cause dyspepsia, and the food gathers in the intestines, leading to the appearance of stomach pain. 3. Acute gastroenteritis: eating cold, spicy stimulation, unclean food, can cause acute gastroenteritis, may appear the performance of stomach pain, in addition to malignant, vomiting, diarrhea and other symptoms. Children every evening stomach pain should be timely medical treatment, under the guidance of specialists to actively carry out appropriate treatment, will help early relief of discomfort symptoms.