While it is true that the creams, oils and greases used in cosmetics can aggravate acne by irritating or blocking pores, many cosmetics and foundations will not actually cause a flare-up to occur. Many foundations on the market can help to improve the look of acneic skin without clogging pores. If you are concerned and don’t want to take a chance, look for products labeled “non-acnegenic” or “non-comedogenic”. To limit the chances of an outbreak or aggravating existing acne lesions, make certain to always cleanse your skin once in the morning and again in the evening to remove the daily accumulations of makeup, oil and impurities. After face-washing, rehydrate and protect your skin with a moisturizing product that’s suitable for your skin type.