Keratosis pilaris (KP, also follicular keratosis) is a very common genetic follicular conition that is manifested by the appearance of rough bumps on the skin and hence colloquially referred to as "chicken skin" as well as "meat bumps". It most often appears on the back and outer sides of the upper arms (though the lower arms can also be affected), and can also occur on the thighs and tops of legs, flanks, buttocks or any body part except glabrous skin (like the palms or soles of feet). Less commonly, lesions appear on the face and may be mistaken for acne.