Thanks for posting your query.
will take more than six months to disappear. Steroids
or oral is a good and effective treatment. But steroids generally produce hypo pigmentation on the surrounding skin as it diffuses on to the normal skin. It is one of the side effects. You may stop steroids and apply non steroidal agents which are available. They are tacrolimus or pimecrolimus
which can be applied once or twice a day.
Have a good day