If you are referring to the acne that typically comes with PCOS, it depends on how your skin is. Is it dry, red & irritated? Use only mild cleansers and a mild moisturizer. Drying out your skin more with acne products will only inflame your skin.

Is your skin greasy and flaky? Use a very mild acne scrub, and rub gently (you can still inflame your skin if you are too rough!) and use an acne moisturizer, such as clean & clear. This will help dry up some oils, and the scrub will remove the flakes.

At night, either way, use a good facial cloth (actually, I use equate [Wal-Mart] brand facial cleansing cloths) and a thin moisturizer beofre you go to bed. And make sure your pillowcases are changed every few days, this is what causes a lot of acne flare-ups!