Which skin type is characterized by a shiny appearance due to excess oil production?

Oily skin is characterized by a shiny appearance primarily due to the overproduction of sebum, an oily substance produced by the sebaceous glands. Individuals with this skin type often notice a slick or greasy feel on their skin's surface, particularly in the T-zone, which includes the forehead, nose, and chin. This excess oil can lead to enlarged pores and an increased likelihood of acne and breakouts, as the oil can trap dirt and bacteria in the pores.

In contrast, dry skin lacks sufficient moisture and tends to appear dull and may feel tight or rough. Sensitive skin is primarily marked by its reactions to environmental factors, ingredients, or products, resulting in redness, itching, or irritation rather than oiliness. Combination skin features characteristics of both oily and dry skin, where some areas may be oily while others are dry or normal. Thus, the defining feature of shiny skin due to excess oil points directly to oily skin as the correct response.