Intestinal obstruction (ileus) refers to the obstruction of intestinal contents in the intestine. It is a common acute abdomen that can be caused by a variety of factors. At the beginning of the disease, the obstructed intestinal segment first undergoes anatomical and functional changes, followed by loss of body fluids and electrolytes, intestinal wall circulation disorders, necrosis and secondary infection, and finally can cause sepsis, shock, and death. Of course, timely diagnosis and active treatment can mostly reverse the progression of the disease and even cure it. Common ones include gallstone intestinal obstruction, enterolith intestinal obstruction, adhesive intestinal obstruction, ascaris intestinal obstruction in children, foreign bodies and foreign body intestinal obstruction in children's gastrointestinal tract, dynamic intestinal obstruction in children, paralytic intestinal obstruction, spastic intestinal obstruction, small intestinal obstruction, large intestinal obstruction, acute intestinal obstruction, neurogenic intestinal obstruction, pregnancy complicated with intestinal obstruction, pseudo-intestinal obstruction, etc.