A comprehensive treatment suitable for problematic, acne-prone skin. The Medik8 Blemish SOS Rapid Action Target Gel contains the maximum concentration of salicylic acid (2%), which quickly minimizes the visibility of imperfections, soothes redness, and leaves the skin clear and healthy. Blemish SOS, like other products by Medik8, is paraben-free and unfragranced, so it does not cause allergic reactions.