If the wound is scabbed over, exposure is usually recommended if the wound is relatively small, and gauze dressing is usually recommended if it is a larger trauma. In the case of relatively small wounds, after the wound has scabbed over, exposure of the wound to the surface is generally recommended. This is because a relatively small wound exposed to the surface, in contact with the air, generally does not produce an adverse reaction, which is conducive to wound permeability, to avoid the propagation of anaerobic bacteria, and to promote recovery. For larger and deeper wounds, it is generally recommended to bandage, this case even if the wound has been scabbed, but the wound may still be infected with bacteria or other microorganisms, pathogenic bacteria repeatedly stimulate the trauma, it is not conducive to recovery; bandage also has the effect of protecting the wound, but also effective in preventing secondary infections, so that the wound to maintain a dry and clean state, which can accelerate the healing of the wound. Wound scab or exposure, need to be analyzed in conjunction with their own situation. If the wound is not healing well, you need to consult a doctor in time, and under the guidance of a professional physician for local care.