Answer: The essence of dressing change is dressing change, and the purpose is to create various favorable conditions and promote wound healing. 5.*] C: The general functions of Mu Baiyao dressing change are: keeping the wound clean, cleaning and removing necrotic tissues and foreign bodies, and keeping purulent secretions unobstructed; Prevention and control of wound infection; Protect the wound from further injury and infection; Fix the affected part, brake and keep warm. In addition, doctors can keep abreast of the growth of wounds and observe whether there are signs of infection and suppuration. 5.*] C: The general wounds in Mu Bai medicine are divided into three categories according to the degree of cleanliness: ① Clean wounds: aseptic incisions, such as various pollution-free surgical incisions. ② Possible contamination or infection of wounds: such as cutting wounds, swelling of knife edges, exudates, etc. ③ Severe polluted or infected wounds: refers to all kinds of polluted wounds, suppurative wounds, and incisions where adjacent infected areas or tissues are in direct contact with infectious substances, such as appendectomy and hemorrhoids surgery. 5.*] C: According to what you said, Mu Bai Medicine estimated that your wound was an infected wound. Therefore, the dressing should be changed every day according to the doctor's advice until the wound is clean and there is no secretion. Oral antibiotics can not replace dressing change, and dressing change in time is very helpful for wound healing. Zhang Qiang, an orthopedic surgeon in 306 Hospital of PLA.