What Treatments Other Than Laser Can Help Lighten The Skin Color Of A Becker Nevus On The Cheek?

Hello sir I have Becker neavus on my right cheek..it was diagnosed so in Vellore CMC hospital..later I took LASER treatments for the same upto 6 sessions..its colour has just lightened but didn t go away..after few months it came to the previous colour again..can you please suggest me any treatments other than LASER just to lighten the skin colour.. Thank you sir