Problem analysis: your situation takes into account that the wound has not healed, which is caused by many reasons, such as infection and diabetes.

Rehabilitation guidance: if the wound does not heal for a long time, epidermal growth factor and packing drainage strip can be used externally to promote healing, which can be treated in burn plastic surgery department. Or check whether the blood sugar is high or the specific blood circulation is not good.

Thank you for your attention to the network, and I wish you health!