Do I have varicose veins or something more serious?

Ever since I was little, maybe 5-6, I've had varicose like spots on my arm. My right arm, on the backside at the top. A little 3"x3" patch of dark purple-blue spots. Not like varicose veins I've ever seen, they're round little spots. And when I push on them, I can push into y arm easily like there is liquid underneath. I know that its blood of course, but are they varicose veins or what? Sometimes they spontaniously ache, just a throbbing pain down my arm. It's a arm pain if someone bumps into me or pats me on the arm. And after they do, my arm will go numb and sometimes my heart will flutter. When I say they feel hollow underneath, by the way, it's like its a round little hole just where the dark spot is...the normal colored skin inbetween feels like it has tissue underneath like the rest of my skin.