Most attacks cause two types of damage; Limb Damage (which affects limb health, as mentioned above), and Pain. Pain represents trauma and shock inflicted. Most creatures pass out upon reaching 100% Pain, and die at 150%. Unless "Pain damage" or "Limb damage" is specifically mentioned, "Damage" means both Pain and Limb.
'''[[Pain sensitivity]]''' is one of the ways to affect incoming damage. It is a percentage value, which serves as a multiplier to ALL Pain received. By default, it is 100% (1.0x multiplier). If Pain sensitivity is under 100%, you will receive less damage than normal, and if over 100%, you'll receive more than normal.
* Example: Pain sensitivity 75% means all incoming Pain damage is multiplied by 0.75x. 115% = 1.15x, etc.