What should you know about ordinary keratosis pilaris?

The bumps form when keratin, a natural skin protein, collects around hair follicles. The surface may feel like sandpaper, while the colour can be skin-toned, pink, red or darker than nearby skin. Upper arms and thighs are frequent sites, but cheeks and buttocks can also be affected. Itching or dryness may accompany the texture. This pattern is different from an infection, although inflamed or picked bumps can become sore.

Use a mild cleanser, short lukewarm showers and a fragrance-free moisturiser after washing. Products containing urea, lactic acid or salicylic acid may soften built-up scale; introduce one active product gradually and stop if burning develops. Avoid rough scrubs, picking and close shaving over irritated skin. A dermatologist may discuss emollient therapy, topical retinoids, a chemical peel or laser hair removal when texture or follicle-related irritation remains troublesome. Results require regular use and the bumps may return when care stops.

Arrange a medical review if the bumps become painful, hot, pus-filled, rapidly spreading or markedly itchy, because another follicle disorder may be present. Seek advice if a new rash does not resemble your usual pattern, if treatment causes persistent redness or swelling, or if you are unsure whether the spots are ingrown hairs or another type of skin bump.

Could this be keratosis pilaris rather than folliculitis or ingrown hairs? Which moisturising ingredient suits my skin? How often should I use an exfoliating product, and what should I avoid combining with it?