He can usually tell you a lot about where he hurts and how much pain he is in. If the only injury seems to be the wound, reassure the victim and begin treatment. Check the wound. In survival situations, more people die from infected wounds than bleeding to death. If the wound is relatively minor and the bleeding is minimal, you'll want to gently clean it before any attempt is made to bandage it.
Nothing causes infection more than bandaging an unclean wound, even if it contains no visible dirt.
Remember that deadly staph organisms are commonly found on human skin. A good way to clean most wounds is to gently bathe the area with mild soap and water. Mop away from the wound, as one would sweep a floor, instead of scrubbing back and forth. The latter only moves bacteria around rather than removing it from the area. Rinse or soak the area well, removing any debris carefully with sterile tweezers.