Women, men and teens with sensitive, oily skin may want a foundation makeup to help cover the shiny areas, pimples or other problem spots. Unfortunately, most cosmetics applied over the entire face to cover blemishes also clog pores, irritate skin and cause breakouts, with the worst offender being oil-based makeup. A non-comedogenic foundation in the form of a powder mineral foundation or an oil-free liquid makeup with a mineral base is less likely to trigger a flare-up of acne or clog pores on the face, and thus is the best foundation for oily skin. Oily Skin Can Lead to Emotional Problems Oily skin is not the fault of the woman or man whose facial pores produce excess oils. Despite the popular idea that a fatty, greasy diet causes excessively oily skin, genetics and hormones play a far bigger role than anything eaten, according to MedlinePlus . Oily skin, if it's there, is probably here to stay - and often concentrates in very visible areas, such as between the eyebrows and ar...