When used alone, apply a few drops of the Oily Skin Bioarome on the affected area and massage in gently to allow total penetration. When use in combination with other Physiodermie products: Face: Mix 5-10 drops of the Oily Skin Bioarome with a Physiodermie Emulsion. Twice daily. Acne Rosacea: Apply the Oily Skin Bioarome prior to the Anti-Redness Micro Gel. The quantity of Bioaromes used must always be less in volume than the product with which it is mixed. Use alone or in combination with other Physiodermie products depending on the skin condition.