Oily skin is caused by the sebaceous glands that produce excessive sebum, which can lead to blackheads, whiteheads, pimples, rashes and other forms of skin irritation. Those who have oily skin often have a very sensitive skin that needs to be properly taken care of daily. The best thing about oily skin is that it ages better than dry skin so it doesn't wrinkle as other types of skin do. So it's not really the end of the world if your skin is oilier...