Depends upon whether you intend the blood to be coming out of an artery or a vein. Blood tends to spurt out of arteries and drip out of veins. You will want some blood drops as well as being smeared across the skin. The surface tension of blood keeps the shape uniform. So the drop is spherical not tear-drop shaped. The easiest way to deal with the blood smears is postwoek. When you smear the blood across the skin do it in several layers with transparencies so it isn't all the same color. That way the wound still looks like its bleeding while some of the red blood cells would appear to have dried on the skin.