What is vein disease?
Vein disease is a condition that can affect the veins in the legs. It can cause leg pain, varicose veins, swollen legs, or open sores. Varicose veins are swollen and twisted veins.
Vein disease happens when the veins in the legs do not work the right way. Normally, the veins in the legs carry blood from the legs back to the heart. The veins have tiny valves inside them to help keep blood moving in only one direction (toward the heart). The valves open to let blood flow to the heart, and close to keep it from flowing back down the leg. Vein disease can happen when the valves are damaged or do not work well. This causes blood to collect in the legs. Blood is especially likely to collect in the legs when a person sits or stands for a long time without walking.