Board Thread:Theories and Speculation/@comment-43776375-20190921063938/@comment-43403813-20191017010628

We also have no proof of what you are suggesting, but given that we have seen the damage that Nagato endured in his life, it would be ridiculous to think that chakra would heal him completely alone.

He would have done so whilst he was alive. He could have asked Konan to defeat mid to high-tier ninja, and bring them to him so he could absorb their chakra. Nagato's wounds are incredibly unique.