Hi there...I am new here and trying to understand the whole TOS thing. I just recently got diagnosed with it (being severe). I too have enlarged veins that are pronounced through my right arm. My hand and forearm to the elbow is just unbelievable. I haven't gotten and explanationas to why other than it can be seen with TOS. My kids get freaked out every time they see my hand becase my veins are buldging. I even get a little freaked out over it. Not sure if it's anything to worry about...I think it's just a symptom.

Best of luck to you.

Tammy