The specific causes of swelling after hemorrhoid surgery are mainly related to the postoperative period and clinical symptoms. Early swelling, basically belongs to the postoperative complications; persistent swelling and pain, increased secretion, mainly consider infection. 1. Postoperative complications: after early hemorrhoid surgery, there will be oozing around the wound, local reflux will be abnormal, which will lead to swelling in the operated area, which is a common complication, pay attention to dietary control, choose warm water bath, most of them can be gradually recovered. 2. Postoperative infection: persistent swelling around the wound, has not improved, and accompanied by significant pain, ulceration and increased secretion, a large part of the infection is caused by the need for regular application of anti-infective drugs, such as levofloxacin and other drugs to control. Continuous swelling after hemorrhoid surgery, and accompanied by abnormal defecation, you need to consult a doctor for observation, after diagnosing the condition, under the guidance of the clinician for standardized treatment.