Introduction

If you've noticed small, rough bumps on your arms or legs that look a bit like "chicken skin," you may have keratosis pilaris (KP). Although the name can sound worrying, KP is a very common and harmless skin condition. It does not usually cause pain or itching, but many people find it bothersome, particularly when it affects visible areas such as the arms or face.

This article explains what KP is, why it develops in certain areas of the body, and how you can manage it effectively.

What is Keratosis Pilaris?

Keratosis pilaris is a common skin condition that affects up to 40% of adults and as many as 80% of children and teenagers.¹ It happens when a protein called keratin builds up and blocks the hair follicles, creating tiny bumps that can feel dry or rough to the touch. 

You can think of it like a small blockage in the hair follicles—completely harmless, but often irritating or cosmetically concerning.

Why does it appear in certain places?

KP tends to develop in areas where hair follicles are more concentrated and where the skin is prone to dryness or friction. This explains why it often appears on the upper arms, thighs, buttocks, and face.¹

Below, we look at each of these areas in detail.

Upper arms

The upper arms are the most common site for keratosis pilaris. The bumps often appear on the outside of the arms, feeling rough and sandpaper-like. They may be flesh-coloured, red, or slightly pink, depending on your skin tone.¹

Why here?

The arms are frequently exposed to air, which can dry out the skin, especially in colder months. Friction from clothing or carrying bags can also make keratin build-up more likely.²

Impact:

For most people, bumps on the arms are a mild inconvenience. However, some may feel self-conscious, particularly in summer when wearing short sleeves. The good news is that consistent skincare can help smooth the bumps over time.³

Thighs

The outer thighs are another common site. These bumps can look similar to those on the arms and are often skin-coloured or reddish. They usually don’t become swollen unless scratched or irritated.¹

What makes it worse?

• Tight clothing or synthetic fabrics
• Sweating during exercise
• Dry winter air

All of these factors can worsen the condition. In fact, many people notice KP flares during the colder months when humidity levels are lower.²

Tip:

Wearing looser, breathable clothing (such as cotton) and moisturising after every shower can help.³

Buttocks

The buttocks can also be affected. KP here may sometimes be mistaken for acne because the bumps can become red and inflamed, particularly if sweat or friction is involved.¹

Why here?

The buttocks are often subject to pressure and rubbing from sitting or exercise. This friction, combined with sweating, can worsen KP.³

What helps:

• Use gentle exfoliation 2–3 times per week (for example, creams containing lactic acid or salicylic acid)
• Apply a moisturiser daily, ideally after showering
• Avoid scratching, as this may lead to scarring or pigmentation

Face

KP is less common on the face, but when it does appear, it is more noticeable. It typically affects the cheeks and is more common in children and adolescents, though adults can also be affected.¹

KP vs acne:

• Acne usually includes red spots, whiteheads, or blackheads
• KP bumps are generally small, flesh-coloured, and not painful

Tip:

Because facial skin is delicate, avoid harsh scrubs. Instead, use gentle cleansers or toners a few times per week and follow with a non-comedogenic moisturiser.²

Summary of symptoms by area

Managing Keratosis Pilaris Anywhere

While there is no permanent cure for KP, regular skincare can make it much less noticeable.

1. Exfoliate gently

Avoid harsh scrubs. Instead, use chemical exfoliants such as:

• Lactic acid
• Urea
• Salicylic acid³

2. Moisturise regularly

Daily moisturising keeps the skin hydrated and helps prevent keratin build-up. Look for creams containing:

• Urea
• Ceramides
• Shea butter

3. Avoid very hot showers

Hot water can strip natural oils from the skin, making dryness worse. Use lukewarm water and gentle, fragrance-free cleansers.²

4. Choose breathable clothing

Wear loose cotton fabrics to reduce friction, especially on the thighs and buttocks.^1,2

5. Seek medical advice if needed

If over-the-counter creams are not effective, a dermatologist may prescribe retinoids (such as tretinoin) or stronger medicated creams to reduce inflammation.^1,3

FAQs

Is keratosis pilaris contagious?

No. KP is caused by keratin build-up in the hair follicles. It cannot spread from person to person.

Does KP go away on its own?

It often improves with age, particularly after adolescence, but may not disappear completely. Good skincare can help reduce its appearance.

Can diet affect KP?

There is no strong scientific evidence linking KP directly to diet. However, a balanced diet and good hydration support overall skin health.

Can I use regular scrubs on KP?

It’s better to avoid harsh physical scrubs, which may irritate the skin. Instead, choose chemical exfoliants such as lactic acid or salicylic acid.

Should I see a doctor for KP?

Most people can manage KP at home. However, if your bumps are painful, inflamed, or affecting your confidence, it’s worth seeking advice from a dermatologist.

Summary

Keratosis pilaris is extremely common and completely harmless, though it can affect confidence, especially when it appears on visible areas. With regular gentle skincare—including exfoliation, moisturising, and avoiding triggers—most people can improve the appearance of their skin over time.

Remember, KP is not contagious, and many people see improvement as they get older. If you are unsure whether your bumps are KP or you are struggling to manage them, a dermatologist can guide you towards the right treatments.