Sclerotherapy can be used to treat smaller veins, including spider veins and reticular veins. A tiny needle is used to inject the veins with one of several different kinds of chemical irritant, or sclerosant, that irritates the lining of the vein. In response, the veins collapse, seal shut, and are reabsorbed by the body. The number of sclerotherapy treatments needed is variable, depending on the number, size, and type of veins being treated. Typically, a patient will receive several injections per treatment session. The procedure is almost always performed in our rooms, and generally, normal activities can be resumed after the treatment. Prescription compression stockings and/or leg wraps may need to be worn for several days after treatment.