Creams are essential in acne treatment. The moisturising effect of creams helps keep pores open, thereby preventing the formation of closed pores leading to acne lesions. Some moisturisers are specifically designed to help prevent scarring, as they work to effectively reduce pustule size and have ingredients that work to prevent future flare-ups. Creams are a bit thicker and greasier than lotions. Some people find it ideal to use a cream in the evening and a lotion in the morning, to avoid the feeling of greasy skin during the day.