Most people assume that once they are finished with puberty, they no longer need to worry about acne. However, adult acne is a lot more common than you probably think. It affects between 40 and 55 percent of people between 20 and 40 years old. No one wants to spend their adult years fighting to keep pimples at bay. Try a few of these natural remedies to get rid of those pesky pimples for good.