Vascular disease is a medical condition involving the blood vessels, including those circulating blood to the heart (cardiovascular), the brain (cerebrovascular) and the rest of the body (peripheral).
Venous insufficiency is a very common condition resulting from decreased blood flow from the leg veins up to the heart, with pooling of blood in the veins.
Spider veins, they are also known medically as telangiectasia or venulectasias, are the mildest manifestation of venous insufficiency, similar to varicose veins but smaller.