Skin problems such as acne are usually related to hormonal fluctuations, which in turn can be exacerbated by stress. Many women in their thirties and forties experience acne during a particular time in their monthly menstrual cycle and despair over the “breakout.” Stress can extend the length of time these skin flare-ups occur, and a compromised, stressed-out immune system can result in an increased amount of time to repair the damage.
Men aren't immune, either. Stress can cause chemical imbalances that can cause or worsen adult acne in men. Teenagers, undergoing dramatic hormonal fluctuations just because they are adolescent, are prone to acne anyway, but stressed-out teens may have a much more difficult time getting acne under control. Remember getting that big pimple right before your first date? It's no coincidence. That's stress.
Long-term stress can lead to chronic acne. And it can contribute to psoriasis, hives, and other forms of dermatitis.