it should be noted that we all have—and need—skin oil (also called sebum). Sebum is necessary for healthy skin. Too little of it and our skin because dry, too much of it and our skin gets too oily. Unfortunately, each of these scenarios can lead to acne. Dry, flaky skin can mix with oil, dirt and bacteria and clog our pores, creating inflammation in the form of acne. Too much oil can lead to clogged pores, in which dead skin, bacteria and more oil can accumulate and, you guessed it, cause acne. The best way to prevent acne is to get oily skin under control.