system
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human
[Avatar] What medical applications for bending are there, if any?

I considered a firebender might be able to cauterize wounds as a sort of battlefield medic.

And other than the base water healing we see in the show.
gpt
In Legend of Korra we also see a Firebender healer at one point. Metalbending of a sufficiently advanced level of skill can also be used to extract heavy metal deposits from the bones and brain of a person, curing heavy metal poisoning (we see Korra and Toph do this to fix Korra's mercury poisoning.)