Stiles looked at him silently for a moment. There was something about that moment that made him not want to tell Derek, like it was some sort of weakness he should have had control over. Looking over to the notebook he'd been scribbling things down in, he got mad and ended up throwing the thing across the room. Lulling his head back he closed his eyes for a moment, not that it made too much of a difference.
"I can't..." He huffed out, despite that it caused an instant migraine just to speak. Derek had already kinda taken care of all that with the ice bath he was still pretty much sitting in anyway.