I have gone through an accident on 21.03.2019 and my knee elbow got badly scraped and already a week passed and I am cleaning the wound with saf dresin solution and on 21.03.19 after the accident within an hour I rushed to a doctor and he cleaned my wounds and prescribed me medicines like staphymox lb, zerodol-sp, etc and after a week its healing but slowly a black and white skin is forming is it good? Do I have to peel it off during dresin? I still have pain on the wounds?