Various attacks cause ability score loss, either ability damage or ability drain. Points lost to ability damage return at the rate of 1 point per day (or double that if the character gets complete bed rest) to each damaged ability, and the spells Lesser Restoration and Restoration offset ability damage as well. Ability drain, however, is permanent, though Restoration can restore even those lost ability score points. While any loss is debilitating, losing all points in an ability score can be devastating. Having a score of 0 in an ability is different from having no ability score whatsoever.