They fell off when the whole power loss mess suppressed my X-gene.

[Because Korra totally knows what an "X-gene" is.]

They're growing back, but I don't know if your heal-bending [that's totally what it's called, right?] can speed that up or what. [Touchy subject, but:] Noatak--Amon--had trouble using his bending on me when I was hurt before.