Facial skin is categorized into 4 main types; dry, oily, normal and combination. If you feel that you skin is excessively greasy and applying creams makes it worse, you probably have oily skin. If you feel that your skin remains dry and irritant even after application of mild moisturizers, it is probably dry skin. If it is none of the two, or in between these; it is likely to be normal skin. Combination skin is mostly normal skin type with oily areas over the forehead-nose region.
Hope this is helpful.