Bug Bites

[bbro]

I got a bite this weekend on my knee. I have no clue what bit me, only that it showed up yesterday morning. I think I am getting worse and worse reactions to bug bites as time goes on. Anyway, this one is on the right side of my left knee near my kneecap. The thing that worries me is that half of my knee is now an angry red, warm (I can feel the heat through my jeans), swollen, and only slightly itchy since I put neosporin on it (don't ask me why, I was on a roll).

Does anyone have any ideas on how to ease this or treatment ideas? I can't really put ice on it because I am at work.

Thanks