I'm having pain in the main vein up the middle of my left arm it's constant won't stop what should i do ? my blood pressure is 144/96

Could be phlebitis: Sounds like you could have phlebitis, which is clot in one of the superficial veins. I suggest that you see a physician or vascular surgeon to be evaluated. If it is phlebitis the treatment is typically NSAIDS and warm moist compresses. Good luck, David Fox, MD, FACS www.FoxVein.com

Pain: it is unclear if this is vein related or pain in the arm where your vein is be evaluated specifially if you had recent blood taken or iv in that arm