Objective A total of 78 cases of varicose veins treated with EVLT and Trivex were retrospectively reviewed in terms of the causes and preventive methods of complications in the procedures. Methods From Jun 2004 to Jul 2006, 78 eases ( men 38, women 40, age range 22-70) with varicose vein were treated by minimal invasive technique, EVLT and Trivex. Results The patients were followed by for 6 months to 2 years. Complications included first degree skin burns in 19 cases, inflammation reaction 4 cases, saphenous nerve injury 15 cases, subcutaneou...