Varicose veins are enlarged, twisted blood vessels that push up against the skin in various parts of the body, particularly the legs. These usually develop when the valves controlling the flow of blood fail. This causes pooling of blood which pushes on the vessel wall causing it to push against the skin. Eventually the affected limb starts swelling, and significant medical issues develop.
In most patients varicose veins are a sign of medically significant vascular disease that requires some type of management. This is especially true when patients are experiencing symptoms such as paid, swelling, cramping, and restless leg syndrome.