1. What are internal hemorrhoids? What are external hemorrhoids? What is mixed hemorrhoids? The cause of hemorrhoids is not very clear, there are two main doctrines, the theory of anal cushion and varicose veins. The anal cushion is a 1.5-2.0 cm wide band of circular tissue above the dentate line. Hemorrhoids are masses formed by pathological hypertrophy and displacement of the anal cushion and stagnation of blood flow in the perianal subcutaneous vascular plexus. Simply put, this pathological change occurs above the dentate line is called internal hemorrhoids, occurs below the dentate line is called external hemorrhoids, the same part of the internal hemorrhoids and external hemorrhoids of the vascular plexus fused with each other both for mixed hemorrhoids. 2, hemorrhoids how to prevent? Prohibit spicy diet, eat more vegetables, fruits and other foods rich in dietary fiber,; prevent constipation or diarrhea, regular bowel habits; avoid sitting, standing or squatting for a long time, and often do anal exercises. 3, to have the right concept Discovery of hemorrhoids and other diseases to be actively treated, short-term does not get better to further check the cause, because even with the presence of hemorrhoids, may also have at the same time, colorectal cancer, anal canal cancer, polyps and other diseases. Hemorrhoids cannot be cured and do not need to be cured. Complete removal of the anal cushions can cause serious complications such as anal incontinence, stenosis, deformity, prolapse of the rectal mucosa, etc. Often hemorrhoid surgery only removes the area where pathological changes have occurred, and the retained normal tissue (anal cushion) can develop into hemorrhoids if care is not taken to prevent them after surgery. Hemorrhoids need to be treated surgically when they have developed to a certain degree, otherwise they will become more and more serious, which affects the quality of life and makes it more difficult to treat them in the future, and the higher the chances of postoperative complications. The principle of hemorrhoid treatment is the less traumatic the better, to achieve the purpose can be, advocate not to add to the patient’s pain and burden of “minimally invasive” surgery.