A T-zone is the area of your face that produces and excretes the sebum (an oil the pores secrete.) It includes the forehead, nose, and chin and is called so because the shape of the three features forms the English alphabet “T”.  For combination skins, this is the most problematic area. While a normal oil secretion keeps the skin hydrated and healthy, excess oil increases roughness, white/blackheads, acne outbreaks, and simultaneously dry patches. The target for combination skin is to wash away the extra oil, not remove the natural oil altogether.