DDD by Dr. Macrene Drugstore, Device, Dermatology  Acne may be caused by several leading factors:  1. Hormones during puberty, menstrual cycle, polycystic ovary disease, and menopause. 2. External factors such as application of occlusive oils, pomades, mica or talc. 3. Dietary factors such as high carbohydrate or dairy intake.   How do hormones cause acne? Hormonal...