A patient with varicose veins and old rotten legs of lower limbs had a history of more than 30 years. Due to the fear of surgery, he had been seeking medical help for many years with external and internal patches, medication and injections, but his symptoms did not improve and his calf ulcers were getting worse. The patient felt that his legs were obviously “lighter” after the surgery, and the feeling of sore calves and easy fatigue when walking disappeared, and the ulcer also tended to heal. In fact, varicose veins of the lower limbs and old rotten legs are very common diseases, the root of which is the expansion and thickening of the superficial veins of the lower limbs due to poor venous reflux, and then the development of which leads to the formation of tortuous clusters, like a group of earthworms coiled under the skin. Patients often feel soreness and fatigue in the lower limbs, and some have edema in the back of the feet or ankles. If left untreated or improperly treated, the skin of the lower leg and ankle will become atrophied, thinner and brighter, with sparse sweat hair, darker color, eczema, and even ulcers. For patients with mild symptoms, they can wear elastic stockings. However, if the symptoms are severe or even ulcers appear, just taking medication and injections and working only on the ulcers will be futile. The most effective solution is surgery to completely remove the diseased vessels. For postoperative residual varicose veins and postoperative recurrence patients, sclerotherapy can be supplemented with injections. Once the obstruction to blood return is resolved, the ulcer will soon grow back naturally, with immediate results.