I'm a sucker for magic healing that *hurts*. I always think of it as feeling like getting hurt in *reverse*, so it's just as painful as getting hurt in the first place was. The more severe the wound, the more exhausted the patient is afterwards, and if the healer used their own magic rather than a potion of some kind, now they're tired too. Biggest one is revival magic, especially when used on subjects that were torn apart or have been dead for so long that they have to regenerate from bones. When the magic is done, they're cold and scared, not sure where they are or what's happening, just that something just caused them the worst pain they've ever felt. Maybe they're even scared that someone will hurt them again? They flinch away from whoever resurrected them, their first words after their death (whenever it was) are "please...no more!"
This is how magical healing should always be done, imho
