is a chronic condition which has poor treatment outcome. It occurs usually due to chronic friction and rubbing of skin for many years. So if you are in the habit of taking scrub bath please avoid that as early as possible.
Many treatments have been tried. Topical strong steroid ointments
can be used but for short duration, 2 weeks to a month. Cosmetology procedures like TCA peel and microdermabrasion
can be tried. Topical DMSO 50% is a treatment which has shown benefits in some studies. But it is not easily available and has to be custom made in certain pharmacies.
All these treatment might decrease it but will not cure the condition. Avoid excessive sunlight exposure, use a sunscreen daily. Stop friction/scrub bath/loofah etc, this is most important.
A second opinion
by another dermatologist
who practices cosmetology is advisable.
Hope this helped.