I think I may have been bitten on the upper back of my right arm. Night before last I noticed what looked like a blood blister on my upper arm slightly smaller than an M&M....red M&M. :haha: Today it's a little bigger, kind of itchy and looks like a white blister with a red ring around it. Does this sound like a spider bite? I'm going to keep an eye on it and if there's a change by tomorrow I guess I'll go to the doctor. Oh yeah, I've had a horrible headache for a couple days too.