The reasons why children say their stomachs feel sick when they eat include psychological factors, gastrointestinal dysfunction, gastroenteritis, and so on. 1. Psychological factors: due to some scenarios or words occurring during the meal to produce a bad psychological shadow on the child, resulting in the child will be in the meal, choose to say that the stomach is uncomfortable to avoid these things happen. As a result, when the child eats, he or she will say that his or her stomach is not feeling well. 2. Gastrointestinal dysfunction: Due to the dysfunction of the gastrointestinal tract of the child, when eating, the gastro-colonic reflex is too fast, and the peristalsis of the colon is accelerated, which triggers intestinal spasms, thus leading to the occurrence of an uncomfortable stomach in the child. 3. Gastroenteritis: Due to unclean diet, the gastrointestinal tract is invaded by bacteria, inflammation and infection occur, resulting in edema and congestion of the gastrointestinal mucosa. Therefore, when the food enters the gastrointestinal tract, it will stimulate the mucous membrane of the gastrointestinal tract, triggering the symptoms of abdominal pain in children. If your child says he or she feels sick when eating, it is recommended that you take him or her to the hospital for a complete examination to determine the cause of the problem and take targeted treatment measures as prescribed by the doctor.