Wound meat is red after hanging wire surgery, may belong to the normal phenomenon, or may be related to infection or scar proliferation and other conditions, need to be analyzed according to the accompanying symptoms. 1. Normal phenomenon: anal fistula hanging wire surgery belongs to the treatment of anal fistula a surgical method, the wire as a knife, slowly the anal fistula tissue removal, when the hanging wire off, the surgical site gradually healing. At this time there will be fresh buds grow, the color of the buds is generally red, but at this time there is no epidermal tissue, there is no oozing and other phenomena. 2. Infection: If the wound site is accompanied by oozing fluid, oozing blood or even purulent secretion, or if the patient already has fever and other symptoms, it is necessary to consider that the wound is infected. 3. Scar hyperplasia: If the wound site has healed and there are bumps around the red tissue, and the color is dark red or purple red, it may be caused by scar hyperplasia, which is common in patients with keloidal physique. Considering that there are many causes, patients should observe more, if necessary, go to the hospital for consultation and examination, professional doctors will give a clear diagnosis.