Patient:A patient had undergone surgical treatment 3 months ago for mixed hemorrhoids with internal hemorrhoids at stage III. For the past 10 days, he has been straining to pass stools, and for the last 3 days he has had blood in his stools, so he is asking what is wrong with him. Doctor:Internal hemorrhoids are formed when the veins at the end of the rectum (blood vessel clusters) enlarge and become tortuous, and are a normal structure in human beings. When affected by some factors will appear symptoms, the main manifestation of bleeding during defecation, no pain, with the development of hemorrhoids volume increase, defecation internal hemorrhoids will be out, you before the operation is hemorrhoids out. Although the ligation is not prolapsed now, but the end of the rectal veins will still exist, just like a person’s fingernail pus doctor to pull out, soon the nail will grow again is the same reason. When you defecate not fluent Nu挣 increased abdominal pressure, this pressure will be geometrically multiplied in the rectal venous plexus, fecal abrasion of the hemorrhoidal surface of the mucous membrane, stools will be sprayed blood, dripping blood, or handkerchiefs stained with blood.