I was talking to an elderly man the other night about how he suffers from hemorrhoids and was very worried after reading from certain propaganda that they can become cancerous. So I spent about 20 minutes telling him about the basics of hemorrhoids. The old man was very satisfied, but also admitted that his knowledge of medical science is limited, and suggested to write a publicity. Zhou Yanyang, Anal and Intestinal Disease Diagnosis and Treatment Center of the First Affiliated Hospital of Henan College of Traditional Chinese Medicine First of all, it is clear that hemorrhoids will not turn into cancer. Hemorrhoids are varicose veins under the mucous membrane skin at the end of the anorectum, gradually increasing into hemorrhoids, stool friction blood vessels lead to bleeding, blood color is often relatively fresh, can be self-stopping after the stool, serious hemorrhoids will be prolapsed, in this case need surgical treatment. Rectal cancer is caused by rectal adenoma cancer, the blood is cloudy, often accompanied by anal swelling, frequent bowel movements, or pus and blood. The two are not necessarily related. However, if there is blood in the stool, it is best to go to a regular hospital for a simple specialist examination to avoid missed diagnosis.