Ok so re-watching Episode 13 and It made me wonder a few things.
I know mercury poisoning can cause muscle deterioration and a whole heap of other things.
But what if she’s got more than just poisoning. It’s possible from the height that she literally dropped from she may have fractured a few things. It’s possible her 3 point landing while awesome has also maybe fractured her ankles and possibly more. Hell Korra could have broken her legs for all we know because we can’t see anything for her dress. For all we know she could have broken both her legs and that’s why she’s in a chair as well. Unable to move her legs that much and no strength to support herself even if she could walk it could be so painful for her.
That’s just my little thought today. She probably hasn’t broken her legs because they’ve all fallen from great heights and still managed to survive but you know. Maybe.