Injury
Injuries are physical traumas that surpass the ordinary loss of hit points, caused by accidents, falls and unusually heavy blows in combat. They represent breaking of bones and bone fractures, ligament and tendon injuries, organ failures, dismemberment, lung scarring and effects from disease, to describe the more common examples. The rule exists to encapsulate traumas to the body that would take much longer to heal than a few days of rest.
Injuries occur when a character takes 15 or more hit points of damage in a single blow. Should this happen, then 1 of those 15 damage is an injury point, which requires 10 times as much healing to remove. For each additional 5 points of damage experienced in one blow, an additional injury point is added.
For example: Caleb the Druid falls 30 feet and suffers 25 damage, reducing him from his normal 23 maximum to -2 hit points. Of this, he receives 3 injury points of damage and 22 hit points of damage. The exact nature of the injury is unspecified, unless it is agreed to use a hit location chart.