(1) promote angiogenesis, the process of new capillaries growing into the wound after trauma; (2) prevent local skin infiltration; (3) reduce venous pressure while maintaining adequate arterial pressure; and (4) relieve pain and provide psychological and social support. Zhao Donghong, Department of Plastic and Reconstructive Surgery, General Hospital of Jinan Military District, has a high degree of decay, exudate, and infection at the site of a mixed multi-causal ulcer, which requires treatment with an appropriate dressing and topical antibiotics, while the surrounding skin should be protected.