Board Thread:Naruto Discussions/@comment-45365336-20200607022744/@comment-9782468-20200607050649

First of all, you used one battle to claim that Jiraiya was more often injured. One battle. And you said he was injured often. That's hardly indicative lol.

TO answer your question, her entire signature technique is to heal by rapidly stimulating growth of new cells. Which means the more she heals, the more she takes off her natural lifetime. And she heals a lot.