The recurrence of varicose veins in the lower extremities after surgery depends on whether the patient can be completely and thoroughly treated during the surgery and whether the patient can strictly follow the medical advice after the surgery. The details are as follows: 1. Because the saphenous varicose vein or the small saphenous varicose vein will have some penetrating branches in the middle of the surgery, the penetrating branches are not obvious at the time of the surgery, and a considerable part of them cannot be treated completely. Therefore, after the surgery, the problem of penetrating branches will lead to the recurrence of varicose veins. But the recurrence rate is 5%-10%; 2. After the surgery, the patient should strictly follow the medical advice. Don’t stand or sit for a long time, because standing and sitting for a long time may cause varicose veins to appear again in other parts of the body several years after surgery; 3. Some patients can’t keep up with pressure therapy after surgery. If the patient does not like wearing elastic stockings or cannot tolerate wearing elastic stockings, in this case, the efficacy of the surgery cannot be consolidated, and the recurrence may occur in the distant future.