A surgical incision that does not heal may be caused by infection of the incision or necrotic tissue attached to the wound, which should be treated in a timely manner in the hospital. 1. incision infection: surgical incision infection may have an impact on the patient’s wound healing, common wound redness, swelling, pain, heat, accompanied by pus exudation and other symptoms are indicative of the presence of infection in the wound, resulting in a long period of time to stay in the state of ulceration, pus, breeding a large number of germs contamination, can be used externally with antimicrobial ointments such as gentamycin ointment, erythromycin ointment, and so on. 2. Wound attached necrotic tissue: surgical cutting, normal muscle, fat and other tissues are damaged by necrosis, or surgical debridement is not complete, resulting in surgical wounds attached to the rotting flesh, the presence of these necrotic tissues affect the normal growth of the granulation, resulting in delayed healing or non-healing wounds. If the wound does not heal for a long time after surgery, you should consult a doctor in time to find out the cause and treat it accordingly.