This powerful blemish solution quickly reduces the appearance of blemishes. Colloidal sulfur helps to absorb excess surface oils that clog pores. Salicylic acid exfoliates dead skin buildup, while zinc oxide soothes sensitive skin. Do not shake prior to use. Dip a cotton swab into the bottom of the bottle and dab sediment on the affected area. Use before bedtime. Best for blemish prone skin and skin that tends to get blackheads and whiteheads.