break outs can be caused by a number of things....make-up that is not suitable for your skin type, improper skincare regime for your skin type, not having a skincare regime at all, not washing off your make-up at night, stimulation from buffing make-up in, pms, stress, poor diet and not enough water intake, not enough sleep or exercise.....the list goes on and on. if there is smoething not right with your body, chances are your skin will let you know.