Ultraviolet disinfection is widely used to disinfect indoors, catering industry and so on, but it can’t be used to disinfect the human body, otherwise it will cause great harm to the human body; disinfectants that can be used after hemorrhoid surgery include iodine volts, alcohol and so on. If the application of ultraviolet light for disinfection after hemorrhoid surgery, first of all, it will cause damage to the skin, including redness, swelling, pain and even peeling of the skin, etc. If the exposure time is prolonged, it will damage the eyes, and the eyes will be painful and tearful, and even cause keratitis and even cataracts; prolonged exposure to ultraviolet light will increase the risk of developing skin cancer. At present, the main disinfectants used for postoperative disinfection and dressing change are alcohol and iodophor, which have significant disinfection effect and less irritation to the skin. Therefore, please disinfect and change medication in regular medical institutions after surgery, and do not do it on your own to avoid secondary damage.