When children have stomach pain, vomiting and fever, they often have acute gastroenteritis, but appendicitis or intestinal obstruction cannot be ruled out. An ultrasound examination of the abdomen should be done to rule it out. If the stomach pain, vomiting and fever are indeed caused by gastroenteritis, the treatment is relatively simple. If the child’s fever exceeds 38.5°C, the child should be given ibuprofen suspension or acetaminophen suspension to reduce the fever. If the child is older than six years old, you can use antipyretic suppositories inserted into the child’s anus to reduce the stimulating effect on the stomach. 4 hours later, you can feed the child a small amount of water, and if the child’s vomiting symptoms gradually ease, you can give the child thin batter or thin pasta water, which is more effective for relieving stomach pain and vomiting. In addition, if the child is still vomiting more serious, you need to fast temporarily, but need to pay attention to supplemental fluids.