A long healing wound is marked by a wound that does not heal after more than 12 weeks. This condition is called a chronic wound, and can be caused by various things. Long healing wounds occur when the wound healing process is inhibited. Some things that contribute to the duration of wound healing, ranging from a history of illnesses such as diabetes, to the adoption of unhealthy lifestyles such as lack of nutritious food intake and smoking habits. Things That Cause Old Wounds Heal Here are some factors that can make a wound take a long time to heal: Impaired blood supply or oxygen Long recovery wounds can be caused by poor blood circulation and oxygen supply. When blood circulation and oxygen supply are not smooth, the wound healing process will be disrupted. Some conditions that cause blood flow is not smooth including suffering from diabetes or peripheral arterial disease. Infection Infection of the wound also causes old wounds to heal. Infection can occur when germs...