Ever since I can remember I’ve had this weird thing with my skin where it puffs up if I scratch or turns bright red. It’s not painful, and sometimes is pretty cool (like when I use a mechanical pencil to draw stuff on myself), but sometimes it isn’t so fun (like when my Spanish teacher asks me in front of the class whether I have a hickey or not).
I never thought about it much because it doesn’t affect my daily life, and I’m so used to it, but I came across this explanation of it while randomly surfing the web.
I don’t have it that bad, and it normally fades away after five minutes, but the picture on Wikipedia’s site is exactly what it looks like when you draw with a mechanical pencil. A lot of people cringe at the idea, but you don’t have to press hard at all to accomplish this; merely scratching with your fingernails often accomplishes the same thing, albiet maybe slightly less raised up.
In any case, I’ve had some fun with it (once having an S like Superman “branded” into my forehead). I’ll take it rather than have to be diabetic or something in the grand scheme of things :).
I’ve found a pretty good picture of it here: