Keratosis pilaris is a common skin condition that causes small, rough bumps to form. These bumps can be red or the same color as the rest of your skin tone, and they do not usually hurt or itch (except if your skin is dry).
Often confused with tiny goosebumps or acne, keratosis pilaris occurs when a skin-based protein [keratin] forms hard plugs within hair follicles. The result is skin-colored bumps about the size of a grain of sand and a fine, bumpy texture. Some cases are accompanied by redness.
Keratin is an essential protein in your hair, skin, and nails. However, when too much keratin is produced, it can form small, scaly bumps on your skin. People with dry skin tend to be more susceptible to keratosis pilaris since dry skin flakes can become trapped inside pores, causing debris buildup and excess keratin within hair follicles.
Keratosis pilaris is found most commonly on the back and outer sides of the upper arms (though the lower arms can also be affected). It can also be found on the thighs, hands, and the tops of the legs, flanks, buttocks, and face, where it is commonly mistaken for acne (especially in adolescents).
Keratosis pilaris also appears to be linked with atopic dermatitis or eczema. Like eczema, KP bumps may go away independently as a child grows into adulthood. For others, KP bumps can be a long-term skin concern.
