This process, called “purging,” is a common occurrence when treating acne. Acne appears on the surface of the skin, but in reality, the root of it is actually below the surface of the skin. As you treat acne, you’re removing the surface layer of skin to get rid of that appearing acne. As a result, that allows the acne from below the surface to come up and be removed as well. That entire process takes approximately four weeks to finish. If after four weeks of using Murad Acne Complex you still feel that your acne is not improving, we recommend that you visit a skin care professional.