erm...last time i got accident, and skin around my knees affected, then see doctor-plastic sugeon in amapng putri, if he can do anything about it, he gave me hydroquanine cream-but have to be monitored by doctor la..otherwise u get skin cancer. anyhow, the skin are lighten. scar almost gone and knee cap skin are lighter. you may try skin lightening cream like olay which doesnt contain hydroquanine(dangerous)