I have recently discovered a couple of raised red spots on my scalp. I accidently scraped one off while combing my hair and it bled for about two days. Shortly thereafter, I discovered two more, bringing the weird spot count to a grand total of three. My wife recently discovered one on her own head, and, since her hair is thinner than mine, we were able to get a better look at it. The bump resembles a red blister. I haven't had the chance to go to a doctor, because I work almost constantly, so I was wondering what the possibilities are. The spots do not itch. There is no further rash surrounding them, which may rule out Lyme Disease (I live in an area infested with ticks).