General wound treatment methods: local treatment of the ulcer surface]: ① skin preparation around the ulcer: first moisten and soften the skin around the ulcer with 0.9% saline gauze or 0.1% Neosporin gauze, gently wipe away debris and skin exudate, and then dry the surrounding skin with sterile gauze; ② implementation of routine disinfection of the trauma bed preparation and removal of scabs. ③ dressing: apply heparin sodium ointment to the ulcerated surface and surrounding skin to improve microcirculation, if the ulcerated surface is deeper, the surrounding skin is red and swollen, and the skin temperature is higher than that of healthy skin, choose silver-containing antibacterial dressing to cover and then add sterile gauze, and finally give pressure dressing with appropriate pressure depending on the degree of swelling of the affected limb. Zhao Donghong, Department of Plastic and Reconstructive Surgery, General Hospital of Jinan Military Region