There are two primary types of vein conditions—both of which are indicative of some level of underlying venous insufficiency. Spider veins are tangled groups of tiny blood vessels just under the skin’s surface that resemble spider webs, hence their name. Typically, they are red, blue or purple and are clearly visible on the thighs, lower legs and face. Varicose veins tend to be larger in diameter and are visibly bumpy or rope-like. Both types of vein conditions can produce physical symptoms—from leg pain and fatigue to itching, burning and nighttime restlessness. Only a comprehensive ultrasound scan can reveal what truly lies beneath your skin.