Board Thread:Naruto Discussions/@comment-1872728-20151110034635/@comment-26773508-20151110080806

Well I think you asked a trivial question instead of a significant one: namely, how does biting oneself heal you in any way? Sasuke healed himself by biting Karin and presumably sucking some of her blood. Her powerful Uzumaki chakra, imbued with incredibly powerful life force, healed Sasuke back so that he could fight against Danzo. But isn't it absolutely senseless that Karin was able to heal by biting herself? Her powerful Uzumaki chakra and life force are already there within her body. Why does she need to suck her own blood from her own body to heal herself, when the blood and the chakra was already circulating inside her body in the first place? I hope someone clears this confusion for me.