Heal Bite

Through biting and consuming the user's chakra, they can heal the injuries of others, as well as themselves.

Overview
This ability has been shown to heal even life-threatening injuries, and is also capable of quickly restoring the stamina of those healed. This technique; however, rapidly depletes the user's own chakra reserves, leaving them with a near-permanent bite mark after each use. Said bite marks only appear once the user has activated the technique. Due to the technique's accelerated depletion of chakra, it is dangerous for one to use this ability too regularly as Karin normally refrains from doing so more than once a day.

Trivia

 * In Boruto: Naruto Next Generations, when Karin's wrists and forearms are shown, there are no marks unlike years before. It is unknown if this is simply an error or if the marks disappear on their own over time.