Hello, Thank you for your query. Your symptoms are suggestive of obstruction in blood flow or local inflammatory process (thrombophlebitis). I would: -clinically examine you for the above - get an angiography and venography imaging to look for obstruction. I strongly recommend that you see your doctor/vascular surgeon right away. In the meantime, - avoid sleeping on that side - avoid lifting weights or repetitive activity like typing, cutting, driving - keep arm Slightly above shoulder level -avoid long warm baths or massages or exercises If you experience any numbness or pale /cold hands /arms, go to the ER. Hope this helps. Please let me know if I can help you with anything else. Wish you good health