Yeah, they are evil lil suckers. The one I had on the left side of my temple partially paralysed my eyelid lol. Had a lazy eye for a couple of days. Noice....
You should be able to see if the head is still in there, although in my experience, even when it is in there, it just becomes a big gross puss-ey pimple that you can pop and get it all out. *barf*