Use a small amount over the face aft­er cleansing skin avoiding the eye area or alternatively dab directly onto spots. Use twice a day, morning end evening. If dryness or peeling occurs reduce application once a day or to every other day. Allow serum to get absorbed before applying moisturizing creams. Patch testing prior to use is advised: Apply product to a less visible part of your skin once a day for three days to test if you are sensitive to Salicylic Acid. This product contains a beta hydroxy acid (BHA) that may increase your skin's sensitivity to the sun. During the day, always apply a sunscreen while using this product and for a week a­fterwards.​Warnings​Use only as directed on unbroken skin. Do not combine with other acids and Retinol. For external use only.