When someone has combination skin, it means that he has areas that are oily and sections that are considered to be dry or normal. The oily skin generally occurs along the nose, chin and forehead, an area known as the "t-zone."
If the skin is marked by noticeable pores, shininess, blackheads and pimples, it is oily. Dry skin is characterized by visible fine lines, rough or flaky patches, poor elasticity, pores that are nearly invisible, a dull complexion and red areas. If the skin has few blemishes, appears smooth and has an even tone, it is deemed normal.
A skin care routine should be suited to the type of skin that someone has. Someone with combination skin needs to keep the dry areas hydrated while decreasing the oil production levels of the oily areas.