“Covering marks is an important part of managing acne, but you can make matters worse if you use the wrong products,” says Joshua Zeichner, M.D., director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City. The best foundation for acne-prone skin has two crucial qualities: It covers up your pimples without looking cakey and it doesn’t clog pores to create a never-ending cycle of breakouts.