Thanks for the query.Acanthosis nigricans
is very difficult to treat.
A few modalities like tretinoin
cream and chemical peels
have been used but results are not that good.
Even though you can try any of these.
The underlying cause of acanthosis nigricans needs to be found and treated.
Dont worry you may get relief with above mentioned treatment.
Please meet a dermatologist
and discuss regarding this.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.