What is Keratosis pilaris?
Keratosis pilaris is a common, harmless skin condition that causes dry, rough patches and tiny bumps, often on the upper arms, thighs, cheeks or buttocks.
The bumps usually don't hurt or itch.
Keratosis pilaris is often considered a variant of normal skin. It can't be cured or prevented. But you can treat it with moisturizers and prescription creams to help improve the appearance of the skin.
The condition usually disappears by age 30.
Keratosis pilaris is caused by the buildup of keratin — a hard protein that protects skin from harmful substances and infection.
It's not clear why keratin builds up in people with keratosis pilaris. It may occur in association with a genetic disease or with skin conditions such as atopic dermatitis.
Dry skin tends to make keratosis pilaris worse.
Source:
https://www.mayoclinic.org/diseases-conditions/keratosis-pilaris/symptoms-causes/syc-20351149
