Tony Vargas
Legend
I always liked the trope of the hero 're-opening his wounds' in some battle or rescue or other act of desperation or rage or the like.Anyway, there are plenty of ways to model meat injury and keep HP as well if that is what your table wants.
D&D, with its plentiful, renewable, daily healing spells had basically 0 opportunity for that.
But, with all the hand-wringing at the time an idea occurred to me, that I kept in my back pocket in case any player in a 4e game I was running got squicked by overnight healing like all these on-line avatars seem to.
It never happened, of course, but still struck me as a decent, if obvious idea: adapt the disease track mechanic to lasting wounds.
You'd risk a wound when dropped, crit when bloodied, or failed a save vs a condition inflicted by a mundane attack.
Like of a monster does some grasping-rend attack that slows, and you fail X saves, then, after the encounter, roll Endurance, or it's a lasting wound...
...from there, using the track, you'd check daily and get better or worse.
Depending on how gruesome (nevermind gritty) you wanted to get, you could get into infection, permanent disability, amputation, and, of course, the ever-poppular death.