Hyperkeratosis (hypertrophy) is commonly known as what?

Hyperkeratosis, often referred to as hypertrophy, is a condition characterized by the thickening of the outer layer of the skin, specifically the stratum corneum. This thickening results from an overproduction of keratin, leading to a rough and hardened texture. It is commonly known as a callous, which forms in response to repeated friction or pressure on the skin.

Callouses typically develop on weight-bearing areas of the feet or on the palms and fingers where there is frequent usage or stress. They serve as a protective mechanism for the underlying tissues. Understanding the nature of hyperkeratosis is important in the context of nail technology, as it helps nail technicians identify and manage nail and skin conditions effectively.

The other options represent distinct conditions that do not accurately describe hyperkeratosis. Blisters are fluid-filled sacs that form in response to friction or injury, warts are growths caused by viral infections (specifically human papillomavirus), and fungus refers to a type of organism that can lead to infections but is not directly related to skin thickening as in hyperkeratosis.