Thanks so much for your response. I had a duplex ultrasound which was normal at rest but showed positional closure of subclavian vein. Then had positional/dynamic venogram which was completely normal. Not sure I understand how/why the two could differ so much. And, neurogenic TOS doesn't explain the hand pain (deep ache w/ severe flareups). This is probably the only thing that numerous TOS docs do agree on.

So, folks keep suggesting CRPS. Sounds like you do NOT think bulging veins is a sign of CRPS ??