ok so about two or three weeks ago i noticed i had a red bump on my penis... very small... its light red normally but when i masterbates it turns to a darker red and the next day its back to light again... once i rubbed on it and it turned purple around it and soon went back to how it was... ive never had sexual contact so what can this be?
sounds like a penile wart,
when you rub it your getting blood flo..and the purple color is normal if theres no action around it.
go see your Doc , he can frezz it off or prescribe you some cream to disolve it..if thats what it is?