Sudden stomach pain and vomiting in children are common in the following cases: 1. Acute gastroenteritis. The child has a history of unclean diet, with abdominal pain, vomiting, pressure pain around the umbilicus and stomach area, you can take oral amoxicillin, multi-enzyme tablets, clostridium typhimurium live dispersion, etc. Observation. 2, intussusception. Abdominal pain, vomiting at the same time will be accompanied by intermittent crying, in the abdomen there is obvious pressure pain, to the hospital in time to perform air enema, X-ray examination clear. 3, acute appendicitis. Most of them are accompanied by fever, poor mental status, and obvious pressure pain in the right lower abdomen, so go to the hospital in time. Most of the blood tests will significantly increase the white blood cells, and if necessary, carry out surgery.