Medical Ninjutsu

is a branch of ninjutsu, associated with healing, as well as the manipulation of their own or an enemies' body practised by Medical-nin. The application of medical ninjutsu requires very good chakra control, as well as knowledge of poisons, herbs, medicines and the human body. The knowledge of a medical-ninjutsu can be used for a variety of purposes apart from pure healing, such as creating and treating poisons, doing autopsies or surgery, or deranging the target's nervous system.

Trivia

 * Tsunade, the most celebrated medical-nin in the world, was able to use an application of medical ninjutsu to engineer chakra-enhanced strength.