Varicose veins are swollen and twisted veins that appear beneath the skin. They are usually red or bluish in color and they... moreVaricose veins are swollen and twisted veins that appear beneath the skin. They are usually red or bluish in color and they are most often seen in the legs although they can develop in other parts of the human body. When you notice their unsightly appearance, consult a Vein Doctor SD before the situation gets worse.