Varicose Veins are swollen, twisted blood vessels just under the skin. You can get them anywhere, but they’re most common in the legs and feet.
Healthy leg veins have one-way valves to help blood flow up to the heart. Varicose veins happen when the tiny valves in the vein become damaged or stop working. This causes the blood to pool in the veins and stretch them out.
Blood that collects in varicose veins can leak into smaller blood vessels (capillaries), which enlarge and form spider veins.