The Endovenous Laser procedure is performed as an outpatient procedure. Under local anesthesia, a thin laser fiber (or catheter) is inserted into the vein through a tiny incision. The catheter delivers laser energy (heat) to the vein wall, causing it to heat, collapse, and seal shut. Most patients return to work and near normal daily activities the very next day. The catheter is used to treat large diseased veins inside the leg which are often the cause of unsightly varicose and spider veins on the surface. In some cases, other treatments including sclerotherapy, ambulatory phlebectomy or ligation are used in combination with endovenous laser to achieve the best possible results.