There are not much effective treatments as far as i know..preventing excessive skin dryness and use of mild cleansers could help.you can apply some emollients, lactic acid, tretinoin cream, tazarotene, alpha-hydroxy acid lotions and peels, urea cream, salicylic acid, topical steroids, and topical immunomodulators. applying topical retinoids weekly are generally the most effective, but the result usually is not complete.After you stop the drugs it might reappear.
Microdermabrasion might help but it needs long term therapy..