Bump on finger: Warts are common skin lesions on fingers. However another common lesion that looks like a wart in shape but is red and "blood-blister" looking is a pyogenic granuloma, a small ball of blood vessels that results from minor skin trauma like a pinch or a cut. Pyogenic granulomas tend to bleed easily and need to be removed and the blood vessels at the base cauterized, otherwise they can recur.
Answered 12/9/2013
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