Laser vein removal can treat smaller leg veins, spider veins, spider nevi, facial telangiectasia, and broken capillaries. Laser light selectively targets vascular lesions. It heats and destroys the unwanted lesions without damaging your skin. Small spider veins may disappear immediately after treatment. Larger spider veins may darken, and you'll likely see themf or 1 to 3 months before they disappear. To get complete clearing, you may need 3 or more treatments.