About 8 months ago, a blue pimple looking thing popped up on my lower back. It looked like almost a REALLY nasty clogged pore at first...like a huge blackhead, except light blue. This is strange because I don't really get pimples. I waited and waited for it to go away....it's not done anything except get just a tiny bit darker blue and MAYBE a bit bigger. I can feel it thru my shirt now. It doesn't look like a mole and wouldn't a "pimple" go away after 8 months??