Postoperative drainage gauze does not always need to be soaked in iodophor. They may also be soaked in petroleum jelly, paraffin oil, saline, etc. and need to be chosen on a case-by-case basis. Drainage gauze primarily helps to drain the body of accumulated inflammatory exudate, which can lead to the reduction or closure of the abscess cavity. Drainage strips made of gauze soaked with povidone-iodine are more conducive to preventing localized infection and are usually used for infected wounds. Drainage strips made of gauze soaked in saline can drain fluid and liquefy the incision, which is suitable for plasma exudative wounds. In addition, drainage strips made of gauze soaked in petroleum jelly are mostly used for hemostasis. Therefore, it is important to choose the appropriate drainage strip according to the actual situation, so as to help the wound recover as soon as possible.