• Exfoliate. When pores are clogged with oil and dead skin cells, they are easier to see. Regular exfoliation with ingredients like alpha hydroxy acids (like glycolic or lactic acids) or salicylic acid will help rid the debris that collects inside. ( Definitely exfoliate with a facial brush like Sigma's cleansing and polishing tool. http://www.sigmabeauty.com/?Click=4779)
• Stimulate cell turnover. Once pores are cleared out, look for ingredients that will keep them that way! Horse Chestnut extract is proven to speed cell turnover and slough off dead skin cells before they can clog pores. Find it in Babor Calming Sensitive Couperose Serum and in Pevonia Gentle Exfoliating Cleanser. Retinoids are also helpful here, and in addition to decreasing oil production, they help you look younger, too!
• Plump skin. The next strategy is to prompt the skin around pores to swell slightly. As the skin plumps, pores will appear to contract. Topical Vitamin C (available in a variety of facial serums), and light in-office light procedures like IPL are effective ways to add volume to the skin and minimize the appearance of large pores.
• Keep in mind that enlarged pores are easier to prevent than to treat after the fact: Wash away makeup every night, and avoid popping or picking pimples because that can permanently stretch pores.
Cited: Skin Type Solutions