After the occurrence of intestinal obstruction, if strangulated intestinal obstruction and hemorrhagic intestinal obstruction occur, intestinal necrosis is usually prone to occur after 5-7 hours. However, intestinal necrosis usually does not occur in the case of mild intestinal obstruction. Strangulated intestinal obstruction is an intestinal obstruction in which the blood transportation of the intestinal wall is impaired, which may be caused by the compression of mesenteric blood vessels, etc. The obstruction causes the blood transportation of the corresponding intestinal segment to be impaired. It may be caused by compression of mesenteric blood vessels, etc. It results in obstruction of blood flow in the corresponding intestinal segment, intestinal necrosis, intestinal perforation, etc. Intestinal necrosis usually occurs in about 5 to 7 hours. Hematogenous intestinal obstruction, on the other hand, refers to the occurrence of embolism or thrombosis of mesenteric blood vessels and other causes, followed by intestinal paralysis, loss of normal peristaltic function, so that intestinal contents can not be discharged normally, and the formation of intestinal obstruction. If not treated in time, intestinal obstruction does not pass generally 2 to 5 days, may appear intestinal necrosis, or even infectious shock occurs. If the disease of intestinal obstruction, should immediately go to the hospital, clear cause of the disease, follow the doctor’s instructions, so as not to delay the condition.