20 days after the minimally invasive hemorrhoid surgery external hemorrhoid wound still pus, to clean up the purulent exudate, potassium permanganate solution sitz bath, serious cases can be given antibiotics anti-infection treatment. 20 days after hemorrhoid surgery wound and pus, usually due to incision pus infection caused, first in the doctor’s guidance, the need to use saline or hydrogen peroxide solution for flushing, will be pus exudate clean, and the use of 1:5000 potassium permanganate solution and other drugs for the local sitz bath, sterilization and disinfection. For serious infection caused by systemic symptoms, you can use antibiotics, such as penicillin, cefuroxime, metronidazole and other oral or intravenous anti-infection treatment. Daily to keep the wound clean and hygienic, develop a good habit of defecation, after defecation, timely local cleaning and disinfection, diet should pay attention to light nutrition, avoid spicy and stimulating food, regular change of medication, outpatient regular re-examination. It is recommended that patients find perianal abnormalities, timely to the regular hospital anorectal examination, to avoid delays in the condition, the use of medication, please follow the doctor’s instructions.