Also: Most boars do about three points of damage each time they ko you, and most bears do eight or nine. You start with one hundred. This means that until you find a ready source of food and leeches to regenerate with you can actually afford to be attacked by boars thirty times, and once you do have leeches and food it becomes no sweat, just maintenance to keep your hp up. So don't be too worried about being knocked out, just spend your hit points strategically to move the boar/bear to where you want it, and find that leech marsh as soon as you can.
(The base rules for leeches are: Heal yourself with leeches only when you are in the green on the hunger bar, and watch your soft hitpoints. Never let them get below 12 or so while healing, especially while standing in a leech marsh. If your shp get down to about 12, rip the leeches off yourself and continue healing only after the shp are back to a safe level.)