METHODS	Patients with ashy dermatosis ( AD ) and postinflammatory hyperpigmentation ( PIH ) were treated using nonablative 1,550-nm FLT ( 15mJ/microbeam , 14-20 % coverage ) , whereas patients with Becker 's nevus ( BN ) were treated with ablative 10,600-nm FLT ( 10mJ/microbeam , 35-45 % coverage ) for three to five sessions .\