Board Thread:Naruto Discussions/@comment-26190972-20151021201438/@comment-2120712-20151022094653

The Yin seal doesn't do any actual healing, just a method to store massive amounts of chakra for more chakra intensive medical techniques. Also unless the name has the -ton portion to it, stated in the technique's description or part of a broad category of jutsu that has their elemental nature given like the Nara or Akimichi techs, its just that: a name. The reason why yin was used in the naming is probably do to the fact that the Yin in Naruto is mental energy, and a big part of the technique is having a quick analytical mind. You could even call it Mind Healing Would Destruction for the heck of it. Some jutsu names are symbolic rather than literal.