I have those also. A few i've had since i was young and the rest turned up more or less after 30 yrs of age (i'm now 36). Often they take years to grow, some stay tiny and others grow large. They are referred to as a cherry angioma, due to their bright red colouring. Do a search on the net and you will find pics and info. They are not cancerious, but apparently if you make it bleed it takes ages to stop the bleeding. I have read in places that they can be removed like other moles.
I wish i knew why some people get them and others dont. There must be a reason for it.