What Causes Vein Problems?
When the valves and veins in your legs weaken or malfunction, blood will have difficulty flowing back to the heart. When this occurs, blood begins to pool and exert pressure on the vein walls, resulting in the thin blue lines of spider veins or the ropey bulges of varicose veins. Though these issues are usually not dangerous, they can be unsightly and sometimes cause numbness or pain, which may necessitate their removal. Leg vein treatments can help.