The technology has really advanced in recent years. Modern lasers target the hemoglobin in the blood vessels, which causes them to heat up and eventually collapse without affecting the surrounding skin tissue. For facial veins, especially around the nose, practitioners usually use specific wavelengths that are safe for sensitive areas. Most people describe the sensation as similar to a rubber band snap, though many clinics use cooling devices to minimize discomfort. The number of sessions varies depending on the severity of the veins, but typically you might need anywhere from one to three treatments spaced a few weeks apart. Results aren't immediate, as your body needs time to naturally absorb the treated vessels.