After getting your thumb caught in a door, if there is no wound, you should always do cold pack therapy at this time. Cold compress treatment can significantly reduce the swelling of the thumb, which in turn reduces the exudation of intertissue fluid, will also reduce the secretion of inflammatory mediators, thereby reducing pain. If the thumb is caught in the car door after the open wound to do a clean bandage, if the wound is small only need to use iodophor solution disinfection, the use of clean dressings or sterile dressings to do the wound bandage. If the wound is large, you need to do the appropriate wound debridement suture treatment, suture should be injected intramuscular tetanus antitoxin.