Your healing spells exacerbate rather than alleviate pain.
Prerequisite(s): Evil alignment.
Benefit(s): Whenever you use a spell to restore hit points to a living creature, you can cause that creature to be wracked with waves of searing pain. If you do, the spell gains the evil and pain descriptors. The target takes nonlethal damage equal to the number of hit points restored. If the target fails its saving throw or chooses not to attempt one against your healing spell, it takes a –2 penalty on saving throws and skill checks for 10 minutes per caster level. If the spell does not normally allow a saving throw, it instead allows a Fortitude saving throw to negate this penalty (but not the nonlethal damage dealt).
Pathfinder Player Companion: Healer’s Handbook © 2016, Paizo Inc.; Authors: Alexander Augunas, David N. Ross, and Stephen Rowe.