Hi, I undergone a bone replacement surgery in leg 6 years ago there was scar mark of surgery. Few months back i got itching on the scar mark now its itching more even arround the skin. The itching area becomes black aswell, i tried on applying coconut oil but nothing helps also tried with antibiotic cream that helped for few days but if i stop using again the itching starts. I assuming that the trowser and inner creates the probelm but not sure about it. I need help.