Medik8 Blemish SOS rapidly works to reduce the look of blemishes. The advanced formula utilizes salicylic acid to exfoliate and decongest the skin, targeting blemish-causing bacteria. Azelaic and dioic acids help to minimize excess oils and discoloration, while niacinamide visibly brightens and balances skin tone. This rapid action target gel encourages long-lasting hydration with a lightweight, undetectable finish; use under or over makeup as needed.