Veins carry blood back to the heart. Ideally the pressure in the veins is low. The veins have to work against gravity to deliver the blood back to the heart. There are valves in the veins to keep the blood from refluxing back and distending the legs veins with high pressures. In patients with varicose veins, some of the valves are faulty, leading to pressure build up in the veins. As the pressure builds, over time, the veins in the legs start to distend. Veins have nerves in them. As the veins distend, the nerves are stretched, leading to an ache or pain or throbbing characteristic of many patient’s vein related pain in their legs. Common vein treatments, such as compression hose, venous ablation of the abnormal veins and sclerotherapy can help minimize this problem, leading to less pain.