Suggest Remedy For Darkening Of The Skin On The Neck Post Burn Injury

I had 2nd degree burns on my neck through the steam of pressure cooker. I had few blisters and the remaining part of neck turned to a darker color. Its been 7 weeks since this incident happened. Current status is, white patches at the place of blisters and the remaining skin is still in a darker color. Any suggessions will be appreciated