In Your 30s

"As women in their 30s and 40s approach menopause, their menstrual cycles become less consistent, which can result in increased breakouts," says Friedman. For many, this type of hormone-related acne appears along the chin and jawline in the form of cystic nodules. "See your doctor if you experience this," notes Friedman. "The best cure might be taking low-dose birth control pills to regulate hormone activity."