Calf traffic branch insufficiency is the main factor of chronic venous insufficiency leading to skin eczema, pigmentation, ulcers and other dystrophic changes (commonly known as polyp leg, old rotten leg), and some people suffer from such ulcers for several years. Because the ulcers do not heal for a long time or recur after healing, it seriously affects the patient’s normal life and work. Some ulcers may even become cancerous and require amputation. Chronic venous insufficiency of lower limbs mainly includes primary superficial venous insufficiency of lower limbs, varicose veins of lower limbs, primary deep venous insufficiency of lower limbs, venous insufficiency of deep and superficial traffic branches, and post-thrombotic syndrome of deep veins of lower limbs. The traditional surgical method mostly adopts Linton and the modified Linton surgical method, through the varicose vein or the ulcer near the incision, the deep fascia is cut to find the traffic branch, which is somewhat blind, and the surgery is time-consuming and laborious, and it is often difficult to find the traffic branch because the superficial varicose vein ruptures and bleeds or because the skin near the ulcer bleeds, so the traffic branch ligation is not complete. In addition, direct incision of the deep fascia to expose and ligate the traffic branches of the calf can cause a high rate of incision infection, prolonged healing of the incision, and slow healing of the ulcer as well as a high recurrence rate. The reason why conventional surgery causes higher wound complications is that the incision is mostly located near the ulcer, and the active ulcer itself is a susceptible factor; secondly, the skin adjacent to the ulcer is in a state of stasis, ischemia, and hypoxia, which also leads to infection and poor growth of the incision. Third, most patients expect the ulcer to be relieved while waiting for surgery. However, instead, the ulcer further worsens while waiting for surgery, causing the patient to lose confidence and seriously affecting the patient’s quality of life, which becomes a clinical insurmountable problem. In order to solve these problems, Europe and the United States and other countries carried out research on deep subfascial endoscopic traffic branch surgery at the end of the 20th century, and in recent years, it has been applied to clinical practice with good results. We know that most of the lower limb ulcers are located in the foot and shoe area, and the lumpectomy incision is located in the upper part of the calf, far from the ulcer, so it can reduce the occurrence of incision complications. The use of endoscopic technique to disconnect the medial traffic branch of the calf has a positive effect on the treatment of dystrophic skin changes in chronic venous insufficiency of the lower extremity, especially venous ulcers. We recently performed deep subfascial endoscopic venous ligation of the traffic branch in two elderly patients with varicose veins in the lower extremities for more than 10 years and extensive mossy and leathery changes in the calf skin combined with ankle skin ulcers, and made two small incisions of 1 cm and 0.5 cm respectively on the patient’s diseased leg, that is, in the upper part of the calf away from the diseased skin, and precisely located the traffic branch in the deep subfascial space through endoscopy and The endoscopic technique was used to disconnect the medial traffic vein branch in the calf, which was very effective and both patients were discharged. We found that the hospital stay for SEPS was significantly shorter than that for conventional surgery, ranging from 2-14 days for SEPS to 14-40 days or more for conventional Linton surgery. We believe that SEPS surgery shortens postoperative hospitalization days mainly because SEPS surgery greatly reduces incisional complications caused by traditional surgery, which in case of incisional infection, patients have to postpone their discharge, therefore, SEPS surgery can significantly reduce patient bed occupancy days, thus saving medical costs and increasing the utilization rate of unit beds. In conclusion, we believe that compared with the traditional surgical approach, deep subfascial endoscopic traffic branch dissection of the calf has a complete traffic branch ligation, a lower incision infection rate, delayed incision healing rate and ulcer recurrence rate, a shorter hospital stay, less trauma and faster recovery. In particular, it brings a boon to patients who cannot be treated surgically due to the presence of ulcer surface. The success of this operation fills a gap in our hospital’s lumpectomy surgery and lays a solid foundation for the development of lumpectomy surgery in our hospital. Pre-operative photo Intra-operative photo Post-operative photo