Oily skin occurs when the sebaceous (oil-secreting ) glands produce more oil than is needed for proper lubrication of the skin. This excess oil can clog pores and cause blemishes. Oily skin is probably largely a hereditary matter, but it is known to be affected by factors such as diet and hormone levels. Humidity and hot weather also stimulate the sebaceous glands to produce more oil. It is a common problem in teenagers but due to various reasons it can occur at any age. Many people have skin that is oily in certain areas and dry or normal in others, a condition known as combination skin. In general the forehead, chin, nose (known as the t-zone area) and upper back tend to be oilier than other areas of the body.
Oily skin has its positive effects. It is slow to develop age spots, discoloration, fine lines and wrinkles. It doesn’t freckle or turn red in the sun on the contrary, it tans evenly. Oily skin on the negative side is prone to breakouts it gives skin a greasy feeling and enlarged pores.