The yellow film on the wound after the scab has just come off is mainly caused by exudation caused by infection and serous exudation. 1. Exudate caused by infection: Wound infection is easy to cause obvious exudate, which will form a layer of scabs, and after the scabs come off there will be a layer of yellow film, accompanied by redness, swelling, tenderness and other symptoms. If the wound is infected, it is important to deal with it in time, in addition to daily dressing change can be combined with oral cephalosporin antibiotics, such as cefuroxime tablets. 2. Serous exudation: During the process of wound healing and crusting, serous exudation will occur in some parts of the wound, forming a layer of yellow film, and it is recommended to use iodine povidone to disinfect the wound every day. It is recommended to avoid scratching the wound during the recovery period, otherwise it is easy to cause scar proliferation and infection and other phenomena, under the guidance of the doctor’s scientific medication.