Another major symptom of hemorrhoids is prolapsed internal hemorrhoids. The internal hemorrhoids that prolapse outside the anus are clamped by the sphincter muscle, the venous return is blocked, and the arterial blood is still continuously input to make the hemorrhoidal nucleus increase in size until the arterial vessels are pressed shut and thrombus formation occurs, appearing as a hemorrhoidal nucleus that becomes hard and painful, and it is difficult to send it back into the anus. The symptoms are blood in the stool and prolapse, bleeding repeatedly and many times during bowel movements will cause the body to 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 balanced state, the loss of iron is very small, the normal adult male daily loss of iron is not more than 2 mg, and blood in the stool of the patient, if the daily blood loss of more than 6 to 8 milliliters of iron loss of more than 3 to 4 milligrams. Normal human male total iron content of 50 mg / per kilogram of body weight, women about 35 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. Iron deficiency anemia due to hemorrhoidal blood loss, generally slow development, early can have no symptoms or mild symptoms, anemia is heavier or faster progress, there will be pale, tiredness, fatigue, loss of appetite, palpitations, heart rate accelerated and physical activity, shortness of breath, swelling, etc., some patients can be neurological symptoms, such as agitation, excitement, agitation, etc., which is thought to be caused by intracellular ferrocyte enzyme deficiencies. These symptoms can be corrected through the anemia, treatment of hemorrhoids disappear. Therefore, if hemorrhoids are found, they should be treated as early as possible to avoid the symptoms mentioned above, which will complicate the treatment. Another major symptom of hemorrhoids is prolapsed internal hemorrhoids. The internal hemorrhoids prolapsed outside the anus, by the sphincter muscle clamping, venous return is blocked, while the arterial blood is still continuously input to make the hemorrhoidal core volume increase, until the arterial blood vessels are pressed closed, thrombosis, hemorrhoids hardened, painful, difficult to send back to the anus. The traditional view is called “strangulated internal hemorrhoids”. But the clinical see external hemorrhoids, the formation of thrombus is more common, so more associated with pain, when the hemorrhoidal nucleus can not be sent back, also known as “embedded hemorrhoids”.