Combination skin means your skin combines two skin types with very different needs. Your skincare routine needs to make allowances for this. Combination skin is characterised by excess sebum production in your T-zone, your forehead, nose and chin, where you skin has an oily, greasy shine. The other typical features of oily skin can also appear in these greasy places. These include big, enlarged pores, blackheads and a tendency to inflammations. By contrast, the cheeks appear dry and matt, with fine, barely visible pores. The sides of the face therefore exhibit the characteristics of dry, sensitive skin. It becomes irritated more easily, tautens and tends to roughness.
To a certain extent, it is entirely normal for the T-zone to be oilier and have more pimples than the cheeks, because it has many more sebaceous glands than other parts of the face. In combination skin, however, these differences can be very extreme. It is also sensitive in certain respects.