Natural Healing
A character will recover 1 hit point per day of uninterrupted rest. However, if the character has a constitution penalty to hp, before rest will begin to affect the character's hp the character must rest for a number of days equal to the constitution penalty. A character with high constitution gains a commensurate benefit after resting for one week; the number of hp regained during the second week will be increased by the amount of the character's hp bonus at the start of the week. Four weeks of rest will return any character to full hp regardless of how many hp the character has lost.