Sclerotherapy remains the primary treatment for small-vessel varicose disease of the lower extremities. These small vessels include telangiectasias, venulectasias, and reticular ectasias. Telangiectasias are flat red vessels smaller than 1 mm in diameter. Venulectasias are blue, sometimes distended above the skin surface, and smaller than 2 mm in diameter. Reticular veins have a cyanotic hue and are 2-4 mm in diameter. Large varicosities do not respond as well as small varicosities to sclerotherapy.