The Ascension Project
A character recovers 1 hit point + Constitution modifier per character level per evening of rest (8 hours of sleep).
A character undergoing complete bed rest (doing nothing for an entire day) recovers 2 hit points + Constitution modifier per character level.
Healing Ability Damage
Ability damage returns at the rate of 1 point per evening of rest (8 hours of sleep). Complete bed rest (24 hours) restores 2 points per day.
Temporary Hit Points
Certain effects can give a character temporary hit points. When a character gains temporary hit points, make a note of their current hit points before adding the temporary hit points. When the temporary hit points go away, the character’s hit points drop to that score. If the character’s hit points are already below that score at that time, all the temporary hit points have already been lost, and the character’s hit point total does not drop.
When temporary hit points are lost, they can’t be restored as real hit points can be, even with medical treatment,
Increases in Constitution Score and Current Hit Points
An increase in a character’s Constitution score—even a temporary one—can give the character more hit points (an effective hit point increase), but these are not temporary hit points. They can be restored through normal healing. When a character’s Constitution drops back down to its previous score after a temporary increase, the character’s full normal hit points go down accordingly.
Certain species have the evolutionary ability to quickly mend wounds and continue fighting.
During combat, at the end of each round the character regains hit points equal to their constitution modifier.