It's a little baffling. Both the fact that her own hand now looks totally normal, but also the fact that Romeo is asking her if it doesn't hurt anymore like his hand is not currently bleeding! At this very moment! If there is still some blood on Madoka's hand, then it's just from the cut that disappeared, and perhaps at this point even mixed a little with the blood that came from Romeo's own wound.

It leaves Madoka staring at the other wide-eyed for a moment, too startled to speak until she manages to force out a: "Y-Yeah, it's okay now.."

Look, it feels important to make sure he doesn't worry about her. But on the other hand, she definitely still is worrying about him!

"W-What about you though? Romeo, why is your hand now the one that's hurt, and not mine..?"