The hazards of hemorrhoids are as follows: First, anemia: one of the most important symptoms of hemorrhoids is blood in the stool, repeated bleeding in the stool will make the body lose a large amount of iron, causing iron deficiency anemia, this is because under normal circumstances iron absorption and excretion of iron to maintain a state of equilibrium, the amount of iron loss is very short. Normal adult men lose no more than 2 milligrams of iron per day, while patients with blood in the stool, if the daily blood loss of more than 6-8 milliliters is lost more than 3-4 milligrams. Normal human male total iron content of 50 mg / per kilogram of body weight, if long-term blood loss, the loss of a large amount of iron, so that the body’s total iron content is lower than normal, can cause iron deficiency anemia. Second, necrosis: hemorrhoidal nuclei embedded in the anus outside, due to a series of pathological changes so that local metabolite accumulation, further aggravated by local edema in the anus aggravated hemorrhoidal nuclei embedded. This is a vicious circle, so the internal hemorrhoid embedded for a long time will inevitably appear necrosis, this time the necrosis is often limited to the mucosal part of the hemorrhoidal nucleus, but there are other parts of the human body infringement. Third, infection: hemorrhoids embedded, there are varying degrees of infection patients with acute and severe, anal distension and other symptoms, the infection is more confined to the anus localized, if the strong reset is easy to make the infection spread, causing submucosal perianal or sciatico-rectal fossa abscess. Foreign countries have reported lethal portal vein sepsis associated with hemorrhoidal core embedded. Fourth, embedded: another symptom of hemorrhoids is internal hemorrhoid prolapse, prolapse outside the anus internal hemorrhoids by the sphincter clamping, venous reflux is blocked and arterial blood is still continuously input, so that the hemorrhoidal core volume increases to the arterial blood vessels are pressed closed, thrombosis appeared hemorrhoidal nucleus, hardened and painful and difficult to send back to the anus. The traditional view is called “strangulated internal hemorrhoids”, but the clinical see external hemorrhoids formed thrombus more common, so more accompanied by pain, when the hemorrhoidal nucleus can not be sent back also known as “embedded hemorrhoids”, long time hemorrhoidal nucleus embedded will also appear lesions.