What is a common characteristic of oily skin?

Oily skin is defined by its increased production of sebum, which is the natural oil produced by sebaceous glands in the skin. This excess sebum often leads to a shine on the skin's surface and can also contribute to clogged pores, which may result in acne or other skin blemishes. Individuals with oily skin typically have a thicker texture and may notice that their skin feels greasy, especially in areas such as the forehead, nose, and chin, often referred to as the T-zone.

In contrast, the other characteristics listed, such as flaky texture, tight pores, and dry patches, are typically associated with dry or combination skin types rather than oily skin. Flaky textures and dry patches result from inadequate moisture and can occur in skin types that do not produce enough natural oils, while tight pores can be a sign of congestion or dehydration, which is not a trait of oily skin.