Spider veins, or telangiectasias, are small, thin blood vessels visible beneath the skin. They appear most commonly on the face and legs. Spider veins are caused by a variety of factors, including heredity, pregnancy, weight gain, long periods of standing, and certain medications. Treatment methods vary depending on the size and location of the abnormal veins. We are successfully treating spider veins with a minimally invasive procedure called sclerotherapy. It is presently the method most commonly used for spider veins on the legs. Using very fine needles, it involves one to five treatments of injecting a solution into the vessels that stimulates your body to absorb them over a period of weeks. Side effects may include slight swelling, bruising, and redness at injection sites.