If varicose veins recur, we need to carefully investigate the cause of the recurrence and rule out problems in the deep venous system. If there is an obstruction in the deep veins, recurrence can occur quickly even after secondary surgery on the superficial veins. If the deep veins are only involved in venous reflux, surgery can still be performed, but it is hoped that medical compression stockings will be worn for a period of time after surgery. Otherwise, there is still a possibility of recurrence after the secondary surgery.