Typically, skin is classified in just a few categories, including normal, oily, dry, and sensitive. If you have combination skin, it means your skin is one type in one area and another type in another area (oily around your T-zone but normal everywhere else, for instance). Your skin type can change over time and can also be affected by factors such as hormones, medications, and diet. To get a good idea of what your skin type might be, wash it gently and leave it product-free for several hours before examining it closely to observe different areas.