I do know that! It's been getting worse slowly, not quickly. The...the discoloration only gets a little bigger every day.

[Except it's covering his upper arm and shoulder by this point, so it's clear he's been hiding this for a while. As best he could, anyways, but even he was starting to worry.]

I'm not that weak! And I know how it was done, dammit!

[He doesn't want to undress in front of someone else, but he's angry enough that he's not going to get too flustered about it. He discards his shirt, revealing the small scars that dot his arms and back. Nothing major, just normal scuffle scars from fighting monsters. He reaches for a black shirt with short sleeves that he can throw a jacket over.]

You're being dense.