North Dakota Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Oily skin is characterized by an overproduction of sebum, which is the natural oil produced by the skin. This excess oil can lead to enlarged pores as it causes the pores to become clogged with oil, dead skin cells, and debris. As a result, individuals with oily skin are often more prone to developing blackheads, a common type of acne that occurs when hair follicles become clogged. Blackheads appear as small, dark spots on the skin's surface, which is due to the oxidation of the clogged material when it is exposed to air.

The other skin types mentioned do not typically feature enlarged pores and blackheads to the same extent. Dry skin tends to have smaller, more delicate pores and may not produce enough oil, leading to flakiness instead. Combination skin presents characteristics of both oily and dry skin but doesn’t generally exhibit the same degree of oiliness and blackhead formation as purely oily skin. Sensitive skin is more related to reactions and irritations rather than pore size or acne, making it less associated with enlarged pores and blackheads. Overall, the characteristics of oily skin make it the correct choice for this question.