Allergic reaction -See post below regarding the relevance of it. Significance of this, is the fact that my immune system seems to react to everything from food to things I touch. Doctors never seem to offer any relief by forms of anti-histamines either. They usually just tell me to avoid whatever I am allergic to and go on my merry way. Problem with that, is the list of allergies seems to always grow and grow, and I am not getting any better. Anyway, just to chuck the picture into context. This is from years ago when I had a possible cancer removed (but wasn't), and the Doctor put some stitches in. I wore a band aid over the stitches for one day, and had a nice allergic reaction to it. So I've stopped using band aids whenever possible.