You keep it simple, no fancy gadgets. Clean the wound with clean water, wipe off dirt, then apply a clean cloth or a small piece of gauze. If you’ve got some boiled salt water, rinse again; it kills a lot of bacteria. Press lightly with the cloth—no squeezing, just steady pressure to stop bleeding. If the wound is deep, stitch it up if you can or cover it with a clean bandage and change it daily. Always keep the area dry, and watch for swelling or pus. That's what worked on the front.