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Keratosis pilaris. Rash on the arm of a male patient with keratosis pilaris. This genetic condition is manifested by the appearance of rough, slightly red, bumps on the skin. It occurs when the body produces excess keratin, a natural protein in the skin, that surrounds and entraps the hair follicles, causing the formation of hard plugs. This process is known as hyperkeratinisation. It is only a cosmetic problem and may be treated using moisturising or keratolytic treatments including: urea, lactic acid, salicylic acid, or topical retinoids. However, the effectiveness of these treatments is limited.
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