Some part of him wants keep the hand away so she has to fight him to look at it, which isn't right. Why would he want Kaylee to have do that? Why is he getting so frustrated with her? The fever must be scrambling his brains.

"Aye, I know, Kaylee. It's just...och, here." He thrusts his hand out so she can look. The cut's not deep, but it appears he's managed to nick a capillary somewhere, as there's a decent amount of blood on his hand. He's feeling slightly nauseous again, although he has no idea if it's this germ thing or the cut, and he turns a slightly anxious-looking face towards Kaylee.

"How bad is it?"