California Cosmetology Practice Exam

Oily skin is characterized by excessive oil production, primarily due to an overactive sebaceous (oil) gland. This skin type typically appears shiny, particularly in the T-zone (forehead, nose, and chin), and is prone to issues like acne, enlarged pores, and blackheads. The increased oil can serve as a double-edged sword: while it may provide some natural hydration and protection, it also creates an environment conducive to breakouts and the accumulation of dirt and bacteria.

In contrast, dry skin lacks sufficient moisture and oil, leading to a rough texture and potential flakiness. Normal skin maintains a balance of oil and moisture, resulting in a healthy appearance without excess shine or dryness. Sensitive skin often reacts to various environmental factors or products, showing redness, irritation, or dryness, but this does not correlate with excessive oil production. Thus, oily skin is definitively characterized by the overproduction of oil, distinguishing it from the other skin types mentioned.