Calling Dr. House

I feel like I should be in an episode of House. While getting ready for bed last night, I looked in the mirror to wash my face, and I saw...something. I lifted my chin, and there, smack in the middle of the soft-tissue area under my jaw was a perfectly round little bruise. Wha?

I touched it, expecting a little jolt of soreness - nothing. I thought back on the day. Had I rested my chin on a pencil eraser? Had I pinched that spot somehow? Had something bitten me?

I couldn't think of a thing. It was just this perfectly round little bruise in a completely inexplicable place. Blow it off, right? But I couldn't. I kept thinking about it, trying to figure it out. And anyone who knows me knows that that never leads any place good.

I mean, what is a bruise really? It's a hemmorhage. So, if you can't remember injuring yourself in any way, and I think I'd remember if I hurt myself under my chin, what could cause a hemmorhage? What kind of disease could that be a symptom of (see what I mean - never leads any place good)? Should I start Googling and see what I can find out? Do I want to know? What do I say to the specialist I'm forced to visit in a few months when my entire immune system is compromised and I have to explain that I saw the tell-tale perfectly round bruise under my chin, but I ignored it? How stupid do I look then?

Or...you know...now, obsessing about a random bruise?