Recently, the ward admitted another patient with varicose veins of lower limbs and old rotten legs, with a medical history of more than 30 years. The patient felt that his legs were obviously “lighter” after the surgery, and the feeling of soreness and fatigue in the calf when walking disappeared, and the ulcer also tended to heal. In fact, varicose veins of lower limbs and old rotten legs are very common diseases, the root of the disease is poor venous reflux leading to the expansion and thickening of superficial veins in the lower limbs, and then the development will be convoluted into a group, like an earthworm 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, but if the symptoms are heavy or even ulcers appear, just taking medication or injections and only working on the ulcers is just scratching the itch, working less or not working at all. The most effective solution is surgery to completely remove the diseased vessels. For postoperative residual varicose veins and postoperative recurrent 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.