The main ingredient of the yellow gauze type is Ethacridine, which can be applied on the surface of the wound or filled in the center of the wound. Its a disinfectant and antiseptic that can have a killing effect on bacteria, fungi and spores. For wounds that are not infected, a yellow gauze strip can be placed on the surface of the wound after dressing change, thus isolating the wound from possible bacterial infection inside. For infected wounds, it is necessary to remove the wound surface sutures, remove the necrotic tissue and infected fluid inside the wound, and then fill the wound with yellow gauze, which can help drain the wound. Yellow gauze can also stimulate the growth of granulation tissue and promote wound healing.