FGF2 and infection: Mussel adhesive wound repair dressing (Youbeiruikang, Jiangyin Beirisen Biochemical Technology Co., Ltd., China) provided antibacterial protection, inhibited biofilm formation, and maintained a moist environment, creating a synergistic effect of “promoting repair + controlling infection.” Once infection was controlled, necrotic tissue removed, and the wound appeared healthy, silver ion dressings were discontinued, and rh-bFGF and mussel adhesive dressings were applied.