Hemorrhoids in acute attacks, especially thrombosed external hemorrhoids, as well as internal hemorrhoids appear embedded, will cause fever. This is because it leads to stagnation of venous blood reflux in the perianal area, inducing local soft tissue necrosis and subsequent infection. In the acute phase of the most effective means of treatment is to choose surgery, laboratory tests will also be found in the blood routine leukocytes and neutrophils proportion increased, after the surgery should choose intravenous anti-infection treatment, such as broad-spectrum penicillin sodium combined with metronidazole intravenous input. For fever choose the antipyretic treatment method, to drink more water, carry on the bath, etc., helps to assist in cooling down the temperature, if necessary, intramuscular lysergic acid injection. During the treatment period, pay attention to the hygiene around the anus, and make sure to wash and change the medicine in time after each bowel movement. If low fever is caused by hemorrhoids, be sure to go to the hospital in time for treatment.