In general healing is accessible, with the jizzle physick being a primary component to the game. Allowing you to theoretically fight on forever. Effects with the [overheal] tag grant temp hp equal to excess healing past your maximum.
Temp HP
There are also many sources of temporary hitpoints, shorthand temp hp. All sources of temp hp do not stack, and you only take the highest value of what you have. Unless otherwise stated, temp hp only lasts 1 minute.
Natural Healing
In the absence of danger, a defeated creature will regain 1 hp after 1 hour. They are staggered until they are healed or they rest.
With a proper 8 hours rest, a character restores all their HP, all of their daily use abilities and recover mana burn. You can only rest once each day.
