What are the small bumps of keratin often found on the back of arms called?

What are the small bumps of keratin often found on the back of arms called? They are called keratosis pilaris.

Keratosis pilaris is a common skin condition in which excess keratin forms plugs around hair follicles. The result is a collection of tiny, rough, gooseflesh-like bumps, often skin-colored, pink, or darker depending on skin tone. The outer sides of the upper arms are the classic location, although the thighs, cheeks, buttocks, back, and other areas can also be affected.

The condition is sometimes nicknamed chicken skin, but it is not the same as temporary goose bumps. Goose bumps result from tiny muscles contracting around hair follicles, whereas keratosis pilaris involves hyperkeratinization—the buildup of keratin that can trap a hair inside the follicle.

Keratosis pilaris is often inherited and is especially common among children. It is not contagious and generally has no serious long-term health consequences. Moisturizers and exfoliating ingredients such as lactic acid, glycolic acid, salicylic acid, or urea may smooth the texture, but treatment usually manages appearance rather than permanently curing the condition. Facial bumps can sometimes be mistaken for acne or folliculitis.