Getting acne pimples under stage makeup is a huge problem. Actors that have acne or acne prone skin need to do two things. One start on an effective medical grade routine that will heal faster their current acne lesions and most importantly prevent future breakouts. Second, choose a light oil-free makeup that will be fit for stage, but will not clog pores or make their acne worse. Check this link for more info on types of makeup and concealers for people with acne prone skin. Lastly the makeup should stay on your skin for the shortest d time possible. Once you finish you days works, wipe it out immediately and cleanse your skin with a mild medicated acne cleanser.