Oily skin types are often due to an over secretion of sebum; the oil that is produced in the subcutaneous glands of the skin. Oily skin will have a shiny appearance and an oily or slippery texture to the skin. The pore size is normally enlarged with an oily skin type. The combination of excess oil production and enlarged pores can lead to blackheads and congestion. The oiliness is more common to appear on the face in the T-zone area. The great advantage of oily skin is that in some cases it ages at a slower rate than dryer skin types.