Hydroquinone is a reversible skin bleaching agent. Tretinoin is a retinoid that increases skin shedding. Fluocinolone is a medium strength corticosteroid that reduces swelling, itching, and redness. Hydroquinone lightens epidermal, pigmentation by reducing the production of new melanin. Tretinoin promotes skin cell turnover, helping to remove the layers with excessive pigmentation Fluocinolone acetonide is a synthetic anti-inflammatory corticosteroid and thus, the effect of its interaction with the body produces vasoconstriction and suppression of membrane permeability, mitotic activity, immune response and release of inflammatory mediators.