We have this notion that during puberty that's when acne spurts. That it's a normal reaction in one's body due to hormonal changes. But then again, do you ever wonder why some adult also have acnes? I'm on my middle 20's and yet there are still pimples occurring in my jawline, chin and even the nose. We may call it adult acne then since it occurs during adulthood. I hate it when that happens. Makes my face dirty to look at.