There are four basic types of healthy skin: normal, dry, oily and combination skin. Skin type is determined by genetics. Finding out your skin type can help you determine how to build the perfect skincare regimen.
Dry skin is lack of oil production in the skin. When there is a lack of production it results in a lack of lipids that hold moisture in the skin. It has a more tighter, dull, texturized feel and could be felt anywhere on the face.
Normal Skin Is perfectly well balanced skin between not too much oil and not too dry. These people are one of the lucky ones. The catch though with normal skin, is as you age your skin has the tendency to become dry so just make sure to always apply moisture to maintain its beautiful complexion.
In combination skin the skin types vary in the T-zone and cheeks. The oilier parts of combination skin are caused by an overproduction of sebum but they also have drier parts caused by a lack of sebum. Usually they feel more oily on the forehead, nose and chin but then dry on the cheeks or vise versa.
Oily skin is used to describe a skin type with heightened sebum production. An over production is known as seborrhea. Common way to determine if you have oily skin would be large pores, sometimes breakout prone and glossy all over the face.