A character may be healed via natural means, the Heal skill, or magical means. When wounded, for each day of complete rest without assistance, the character recovers one (rolled) Hit Die + CON modifier of hit points. With the assistance of someone with the Heal skill, the Hit Die result is maximized. A character may also use the Heal skill to stabilize a dying character by spending one round applying first aid.
By taking a short rest of an hour, a character can recover up to one (rolled) Hit Die in hit points, up to his or her maximum Hit Points, provided the character still has at least his or her CON Score in hit points remaining at the start of the rest period,. Example: Edda the 3rd level Fighter has a CON of 14, a maximum of 22 hit points, and has 16 Hit Points at the end of a fight. After a short rest, she rolls 1d8 and regains 7 hit points of fatigue and is back to her maximum of 22. However, if she had had 13 hit points at the end of the fight, she could not recover any Hit Points by a short rest, as she has physical wounds which must heal. Multiple short rests may not be combined during the course of a day.
If a character with the Heal skill performs first aid during a short rest, the resting character gains an additional (1 + CON bonus) (minimum 1) Hit Points. These Hit Points are gained even if the character’s Hit Points at the start of the rest are below his or her CON Score. Example: Edda the 3rd level Fighter has a CON of 14, a maximum of 22 hit points, and has 13 Hit Points at the end of a fight. Tended by Neville the Cleric, who has the Heal skill, she takes a short rest and recovers 3 (1 + 2) hit points, to a total of 16. She cannot recover a Hit Die of hit points during the short rest because she started below her CON score. Neville then casts a Cure Wounds spell on Edda, curing 1d8+2 = 6 hit points and restoring her to full strength.
Magical healing (spells, potions) immediately restore hit points. A character cannot have more hit points than maximum.