Stress causes acne.

Although stress is not a direct cause of acne, this myth does have some basis in truth.  When we become stressed, our body increases production of cortisol, which in turn causes the sebaceous glands to produce more oil.  Individual stress responses vary dramatically, so it’s difficult to gauge a “typical” effect on the skin. Also remember that even good stress, like the excitement of planning a wedding or anticipation of going to college, can trigger a stress response.