Long-term non-healing of broken skin on the calf may be related to wound infection, diabetes, vascular disease and other reasons. 1. Wound infection: If a wound infection occurs, due to the stimulating effect of inflammation, it can cause local capillary expansion, local redness, swelling, oozing and so on, affecting the normal healing of the broken skin. 2. Diabetes mellitus: due to the impaired tissue repair function of diabetes mellitus, white blood cell phagocytosis decreased, etc., which can affect the healing of the wound. 3. Vascular diseases: such as varicose veins of the lower limbs, due to poor blood circulation in the legs, affecting the nutritional function of the wound, which in turn affects the healing time. It is recommended that those who have broken skin on the lower leg that does not heal for a long time should go to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.