In Castiel's eyes, Meg really could make him feel better just by being there. It may not be instantaneous, but it was certainly something that came thanks to her being there. He could be in this current state of agony, but having her there for him made him feel better enough, enough that he wasn't ready to just give up on feeling better. Before he reached out on the network, he'd been ready to just crawl into bed and remain there, not knowing how to make himself feel better, but Meg put a sense of ease in him, one that he was grateful for, along with her caregiver abilities. He didn't even care that she was just as clueless about this as he was, because he would have floundered completely if he were on his own with this.
"Why do I need to take my shirt off?" He asked, curious about what that would do for him. "Wouldn't it only make me cold, if I were to do that?" He kept going between hot and cold, the reason why he was so sweaty in the first place, but had managed to level out for now. He didn't understand why the human body reacted like this and was growing frustrated with the constant throwing off of the blankets, only to pull them back later, because he'd gotten cold. The wrapped candy, he quickly took care of in unwrapping it and popped it into his mouth, so he could suck on it. The relief, it wasn't as great as he'd anticipated, but it was enough to make him feel less like his throat was on fire. It was slowly numbing it, coating it to give him some comfort and that was enough.