Illinois Nail Technician Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

A callus is a thickened area of skin that forms as a protective response to repeated friction, pressure, or irritation. The term "hyperkeratosis" refers specifically to the thickening of the outer layer of the skin, known as the stratum corneum, which occurs in response to various stimuli, including the formation of calluses. This condition is characterized by an increase in keratin, the protein that makes up the outer skin layer, leading to the hardness associated with calluses.

Understanding the terminology is essential for nail technicians as it helps in identifying skin conditions that may require special consideration during nail care treatments. Knowing that hyperkeratosis corresponds to calluses allows technicians to recognize their appearance and take appropriate actions in practices such as smoothing and exfoliating the area to ensure client comfort and nail health.

In contrast, the other terms listed do not accurately describe a callus. "Soft skin" implies a lack of thickness, which is opposite to the definition of a callus. "Dermatitis" refers to inflammation of the skin, which has different causes and symptoms than those associated with calluses. "Keratosis pilaris" is a skin condition characterized by small, rough bumps often found on the arms and thighs