I recently have formed this mole on my back it sticks out like a pimple but is filled with blood. Could this be a blood blister? Once I accidently scratched it and it starting bleeding alot, I keep away from it now, should I have it checked out? Its been there for about 6 months now and is on the upper right side of my back. Any input would be great thanks!

Sounds like a cherry nevus. They are benign but if you need to ease your mind then have it looked at. My Melanoma looked like a blood blister...dark blue/red but no blood came from it as a blister would when popped.