Varicose vein surgery is the most conventional method of treating varicose veins. But generally there will be some slight swelling of lower limbs for a period of time after the surgery, mainly due to the following reasons: 1. It may be because the original blood vessels have been destroyed after the surgery, the new blood vessels have not yet been established, and the collateral circulation has not been established, there will be some time of lower limb swelling, which can gradually recover in about two weeks. 2. For some very serious swelling or swelling that continues to worsen, patients are advised to go to the hospital to review the ultrasound for the possibility of secondary thrombosis after surgery. The above swelling can be treated by elevating the affected limb, taking oral anti-swelling medications such as Mai Zhi Ling, and if the swelling has inflammatory factors, anti-inflammatory medications can be used for symptomatic treatment.