Dear Sir,
Becker Nevus is a common dermatoses that is benign and not palpable with only increased hair growth, increased coarse texture and pigmentation usually affecting the upper parts of the body. Young man or woman with this condition need not be discouraged or too significantly bothered by this condition for the reason that even without treatment, the negative effect on body appearance is minimal and one certainly should not feel depressed by this minor skin disorder.
Light treatment with lasers or intense pulsed treatment give mixed and variable results toward pigment reduction and there is no gurantee that 10 or more laser treatments will reduce the pigmentation or color by 50% or more. Total removal without scarring is very difficult.

You should have a consultation with a doctor first to review the risks, benefits, alternatives of treatments by lasers, lights or chemical peels etc.

Best regards,
Dr. Walter W. K. King