<unk>  occurs when the human body produces excess amounts of the skin protein keratin, resulting in the formation of small, raised bumps in the skin, often with surrounding redness. The excess keratin, which is the same color as the person's natural skin tone, surrounds and entraps the hair follicles in the pore. This causes the formation of hard plugs (a process known as hyperkeratinization). Many<unk>  bumps contain an ingrown hair that has coiled. This is a result of the keratinized skin's "capping off" the hair follicle, preventing the hair from exiting. The hair grows encapsulated inside the follicle.<unk>  is more common in patients affected by atopic diseases such as allergic rhinitis and atopic dermatitis.<unk>  subtypes are occasionally part of genetically inherited syndromes associated with intellectual disability, neuro-cardio-facial-cutaneous syndromes, RASopathies, ectodermal dysplasias, and certain myopathies.
Keratosis pilaris
Erythrokeratodermia variabilis
Tinea imbricata
Dermatosis papulosa nigra
Dermatosis neglecta
Hydroa vacciniforme
Telogen effluvium
Epidermodysplasia verruciformis