Liquid dressings are liquids that disinfect and protect wounds. Liquid dressing contains disinfectant, such as polyethylene glycol and so on, after spraying the liquid dressing on the wound, the disinfectant can directly act on microorganisms, can kill microorganisms, thus preventing wound infection. After a wound occurs on the body, after applying liquid dressing externally, the liquid will form a protective film on the surface of the wound, which can protect the wound and isolate the wound from the outside world, thus preventing the invasion of external bacteria into the wound. After the wound, you need to disinfect the wound, you can use alcohol, iodophor or liquid dressings for disinfection, has the effect of sterilization, can prevent wound infection, promote wound healing, such as trauma, deep wounds, please consult a doctor in a timely manner in order to gradually heal the wound.