Which skin type is often characterized by excess oil production?

The skin type characterized by excess oil production is oily skin. This condition occurs when the sebaceous glands in the skin produce more sebum than necessary. This excess oil can lead to a shiny appearance and may contribute to issues such as acne and enlarged pores. Oily skin often feels greasy, especially during warm or humid weather, and is prone to breakouts due to the combination of excess oil and possible bacteria on the skin's surface.

In contrast, dry skin lacks sufficient moisture and often appears flaky or rough, while combination skin exhibits characteristics of both oily and dry skin areas, typically being oily in the T-zone and dry on the cheeks. Normal skin maintains a healthy balance between oil and moisture without excessive shine or dryness. Thus, only oily skin fits the description of being characterized by excess oil production.