Pimecrolimus cream 1% (Elidel®, Novartis Pharmaceutical) is a topical calcineurin inhibitor that binds to macrophilin-12 and inhibits cytokine synthesis by T lymphocytes. Elidel has been approved by the FDA for the treatment of mild to moderate atopic dermatitis. In theory, as Elidel inhibits T lymphocytes, it should effectively treat lichen sclerosus. In addition, as Elidel does not inhibit keratinocytes, or affect collagen synthesis, it does not cause dermal atrophy. Therefore, Elidel may be an effective and safer alternative treatment for LS. This study is designed to compare the effectiveness and safety of Elidel 1% cream versus an ultra-potent corticosteroid (clobetasol 0.05% cream) for the treatment for vulvar LS.