She watched Wan's expression closely. The noticeable change in his facial features. So it was an old wound. There went the idea that she could do something about it--she wasn't that good of a healer.

But it was more than that. Zuko had gotten the wound during a time when, she guessed, Wan hadn't even known him. Being from Aang's time meant that he was from way into Wan's distant future. So they had only met here. Which meant...his reaction...

"Are you okay?"