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Keratosis Pilaris ("Chicken Skin"): Causes and Care

Small, sandpapery bumps on the backs of the arms or thighs are usually keratosis pilaris. This page is educational information, not a medical diagnosis or treatment; see a dermatologist if symptoms are severe.

What keratosis pilaris is

A common, benign skin condition in which keratin builds up at hair follicle openings, creating small, sandpaper-like bumps. Often nicknamed "chicken skin," it typically appears on the backs of the arms, thighs, and buttocks, tends to run in families, and is not contagious.

Main causes

It's believed to occur when dead skin cells inside the hair follicle fail to shed normally and build up, blocking the pore. Genetics play a large role, and it tends to be more pronounced in people with dry skin or a history of eczema.

How to manage the buildup

Products containing AHAs (glycolic or lactic acid), BHA (salicylic acid), or a low concentration of urea are commonly recommended for gently managing the buildup. Vigorous physical scrubbing can irritate the skin further and make bumps worse, so it's best avoided.

Why moisturizing matters

Pairing exfoliating actives with a ceramide-rich moisturizer to support the skin barrier is considered central to managing keratosis pilaris. Since it tends to flare up more in dry seasons, applying moisturizer right after a bath or shower, while skin is still damp, is a helpful habit.

Habits to avoid

Rough exfoliating mitts or cloths, and long showers in very hot water, can worsen irritation and dryness and are best avoided. Picking, squeezing, or scratching at the bumps can lead to inflammation, dark spots, or scarring.

When to see a dermatologist

If the bumps are notably red and inflamed, very itchy, or not improving with routine care, it's worth seeing a dermatologist, who can also discuss options like a prescription topical retinoid if needed.

Can it be cured, and how is it different from acne?

Rather than eliminating the underlying cause β€” a genetic tendency toward this pattern of keratin buildup β€” entirely, keratosis pilaris is usually managed with consistent care to reduce how noticeable it is, and it's known to improve naturally for many people as they get older, past adolescence. It can look similar to small acne bumps at a glance, but keratosis pilaris comes from built-up keratin rather than inflamed oil glands, which is a different underlying cause from acne.

Is it okay to use AHA/BHA every day?

AHA, BHA, and PHA ingredients can be irritating depending on concentration and skin condition, so it's best to start with a lower frequency and gradually increase it while watching how your skin responds, rather than using them daily right away. This is general skincare information and not a substitute for a dermatologist's advice.

Frequently Asked Questions

Does keratosis pilaris go away with age?

It varies by person, but symptoms often ease naturally after adolescence, into adulthood. That said, it can also persist into adulthood without fully going away for some people.

Does tanning help?

A tan can temporarily make the redness less noticeable, but UV exposure is harmful to skin in the long run, so it isn't a recommended way to manage it.