Undead First Aid
I have always thought of First Aid as Bandaging, CPR and other essential life saving techniques its even in Huntsman which is more of a survivalist, so why does it hurt undead? Have you ever tried bandaging a Zombie? I bet it would hurt you more then it hurts them!
Note I am not sure if this effects an enemy’s first aid skill. If you happen to be playing with an undead character and you run across a situation that the enemy casts first aid on them, and it hurts them, please let me know and I will try and fix it.