Scars on the legs have not been healed, you need to consult a doctor to identify the causes and then take appropriate treatment, common causes include wound infection, diabetes and so on. 1. Wound infection: when the wound care is not appropriate or treatment is not timely, resulting in infection, it is easy to appear difficult to heal the phenomenon, you can go to the hospital by the doctor for surgical anti-infection treatment, such as symptoms are serious, can be applied under the guidance of the doctor oral medication, such as erythromycin capsules. 2. Diabetes: If the patient’s blood sugar rises for a long time, it will easily lead to many complications (such as poor blood circulation and reduced nutritional supply), which will easily lead to difficult wound healing, so you need to go to the hospital to control your blood sugar to the ideal level under the guidance of a doctor and be treated by a professional doctor, such as surgical dressing change and active anti-infective and the use of drugs to promote wound healing. All of the above medications should be used under the guidance of a professional doctor, avoid self-medication. Scars on the legs have not healed may also have other causes, it is recommended to go to the hospital in a timely manner to improve the examination, to find the cause of the targeted treatment.