In children, intussusception can be diagnosed by clinical symptoms and by air or barium enema and imaging tests. 1. Clinical symptoms: The three typical clinical symptoms of intussusception are abdominal pain, bloody stool, and abdominal mass. It is characterized by sudden and very severe paroxysmal abdominal pain, and infants may show abnormal crying. It is often accompanied by vomiting and jam-like blood in the stool. Abdominal palpation is performed for a salami shaped, smooth, indurated mass. It is usually located above the right umbilicus, and there is a sense of emptiness on palpation of the right lower abdomen. 2. Air or barium enema to diagnose: enema can not only diagnose but also can treat, its imaging performance for mucosal folds or folds scarce, stereoscopic position can be seen more than one gas-liquid planes are arranged in the form of a ladder, the gas in the stomach, the small intestine is reduced or disappeared. After the imaging examination combined with clinical symptoms, usually can be found in children intussusception, once there are uncomfortable symptoms (such as severe abdominal pain symptoms), it is recommended to go to the hospital immediately.