What is a common sign of oily skin?

A common sign of oily skin is shininess. Oily skin typically results from an overproduction of sebum by the sebaceous glands. This excess oil can make the skin appear glossy or shiny, particularly in areas such as the forehead, nose, and chin, often referred to as the T-zone.

While other conditions like dryness may show signs of flakiness, oily skin does not exhibit this characteristic; instead, it presents with a slick surface due to the high sebum levels. Redness is often more associated with irritation or inflammation and not a defining feature of oily skin. Tightness is generally seen in dry skin cases, where the lack of moisture leads to a feeling of stretching or discomfort. Therefore, shininess stands out as the most indicative sign of oily skin.