Amedical expert who specializes in veins operates under two names: vein specialist and doctor of the veins. Medical professionals who specialize in vein disorders diagnose and treat patients with varicose veins and spider veins and chronic venous insufficiency. The United States has a high rate of these conditions which lead to painful swelling and heaviness in the legs and noticeable changes that affect both health and physical appearance. A qualified vein doctor delivers accurate diagnoses to patients while providing them with suitable treatment options.