It's easy to see why so many people think this. After all, it's estimated that around 85% of teens have some form of acne. Unfortunately, acne doesn't just go away when you become an adult.nnMany people do grow out of acne but many others experience it well into their adult years. Although dealing with acne as an adult can be frustrating, consulting with a dermatologist is the best way to figure out how to resolve the issue.