The anal tube, the rectum leave outside the anus to the eversion, is called the anal tube rectum to escape heavily, abbreviation prolapse of rectum. Occurs in 4 year-old within young child, but 1 year-old within baby very little saw that trouble this sickness, this disease mostly may convalesce voluntarily along with the age growth. the prolapse of rectum's reason has two broad heading the 1, innate factor: With on rectum's dissection characteristic related, namely young child's congenital factor is the pelvic cavity organizational structure growth has not consummated, supports rectum's peritonsillar tissue to be interlinked weakly, fixed is not firm. 2, day after tomorrow factors: Is at the markup condition for a long time for abdominal cavity's in pressure, like forcibly bowel movement, fierce cough, vomit, frequent diarrhea; Bowel movement custom bad, sits the bed pan time excessively long and so on, may urge the rectum to escape heavily. This kind of situation might as well makes an analogy, the sleeve cuff regards as the anus, if in clamps is not firm with the lining connection, in clamps easily leaves from the sleeve cuff, the prolapse of rectum occurrence is this truth. prolapse of rectum early performance only when bowel movement has a group red to be also wet, the soft tumour in the anus stopping place, after then, the tumour very quick frame shrinks to the anus. Manifests suddenly after repeatedly, the tumour cannot the retraction, probably use the hand immediately to help the tumour reply. Because escapes frequently heavily, the mucous membrane receives the friction stimulation, the mucilage secretion increases, the mucous membrane has the hyperemia, dropsy, the hemorrhage, ulcer, even necrosis.how does that avoid the prolapse of rectum the occurrence? 1, must make the young child to form every day fixed time the bowel movement good habit, prohibited that sits the bed pan time to be excessively long. 2, have the constipation young child, usually should drink water, eat contains cellulose food richly. 3, have the cough and repeatedly the diarrhea baby, active treatment the primary affection primarily, prevents the prolapse of rectum the occurrence. cannot reply voluntarily frequently to the prolapse of rectum, must go to the hospital to carry on the treatment. If the general conservative treatment still did not have the effect, that must perform the surgery.