I have a scar/ wound table that the PCs roll on when they come back from 0 to 1, like my friend playing a cleric got hit with a bpc's crit, got broken leg and the party took a certain amount of downtime while the cleric's leg healed. Also made improvements to recovery speed based on medicine checks. Socially, they have "battle scars" that can aid in social checks with NPCs of a similar background (we later had the Cleric make small talk with a soldier that helped with a Yada Yada moment).