Acne occurs most commonly during adolescence, affecting an estimated 80–90% of teenagers in the Western world. Lower rates are reported in some rural societies. In 2010, acne was estimated to affect 650 million people globally making it the 8th most common disease worldwide. Though it becomes less common in adulthood than in adolescence, nearly half of people in their twenties and thirties continue to have acne. About 4% continue to have difficulties into their forties.
These are some of the therapy, which can be used: Lasers and Light Therapy, The Melatonin Cycle, and Acne Topical Products.
Body mass index is negatively associated with acne lesion counts in Taiwanese women with post-adolescent acne. I can’t get access to the full text of this study, but it appears that researchers found evidence that heavier people have less acne than thin people.