Those pesky, painful, and unpleasant pimples that seem to pop up at the worst times imaginable—right before a long-awaited vacation or just before your sister’s wedding for all your family to see—are downright difficult to deal with. Weren’t you supposed to shake off acne in your teen years? Sadly, not—especially if you’re battling bouts of hormonal acne, which most commonly appears in adult women ages 20 to 40.