Natural Recovery

Basic Set: Campaigns · p.424

Rest lets you recover lost HP,
unless the damage is of a type that
specifically does not heal naturally
(for an example, see Illness, p. 442). At
the end of each day of rest and decent
food, make a HT roll. On a success,
you recover 1 HP. The GM may give a
penalty if conditions are bad, or a
bonus if conditions are very good.