Keratosis Pilaris

Keratosis pilaris (KP) causes tiny rough bumps when keratin plugs the openings of hair follicles, creating a sandpapery “permanent goosebump” texture. ^(1,4) It isn’t dangerous or contagious — but many people want smoother skin and less visible redness. ^(1–4)

What is keratosis pilaris?

Keratosis pilaris is a benign follicular condition where keratin builds up in the follicle opening, forming tiny plugs and rough bumps. ^(1,4) Common sites include:

• outer upper arms
• thighs
• buttocks
• sometimes cheeks and forearms ^(1,3)

KP is not a sign of poor hygiene and doesn’t turn into skin cancer.

Who gets KP and why does it happen?

KP commonly runs in families and is linked with dry/sensitive skin types. ^(1,2,4) It’s also frequently seen alongside atopic conditions such as eczema and ichthyosis vulgaris patterns. ^(1,2)

The “bricks and mortar” analogy (why bumps form)

A helpful way to think about your skin is like a wall of bricks: The bricks are the outer skin cells. The mortar is the “glue” that holds those cells together. In most people, the top “dead bricks” naturally shed over time. In KP, that “mortar” is extra sticky — so instead of shedding cleanly, the dead cells tend to cling and collect around hair follicles. This creates a tiny plug at the follicle opening, which feels rough and bumpy and can look red or spotty. ^(1,4) This process is often described medically as follicular hyperkeratinisation (a tendency for keratin and dead cells to build up at follicles). ^(1,4) If you also have eczema or very dry skin, you may find the Eczema page helpful.

What KP looks and feels like

Typical features:

• many tiny, uniform bumps (“goosebump” texture)
• skin feels rough or dry, like sandpaper
• bumps can look skin-coloured, pink/red, or darker depending on skin tone
• usually not painful; can be mildly itchy when very dry ^(1,3,4)

KP rubra faciei (red, rough cheeks)

A facial subtype called keratosis pilaris rubra faciei causes rough red follicular bumps and background redness on the cheeks (often in children and teens). ⁽⁶⁾ This can be mistaken for eczema, acne, or even rosacea — so diagnosis matters.

The best home routine (simple and effective)

KP responds best to consistent, gentle care for at least 6–8 weeks.

Daily basics

• Short, warm (not hot) showers
• Use a gentle cleanser (avoid harsh soaps) ⁽⁵⁾
• Moisturise daily, ideally right after bathing ^(1,4,5)

Gentle exfoliation

Light exfoliation can help, but over-scrubbing backfires. ⁽⁵⁾ Think “polish”, not “scrape”.

Active ingredients that work

The most useful KP ingredients are both moisturising and keratolytic (help loosen follicular keratin).

Urea (often a first pick)

Helps soften and hydrate while loosening keratin. ^(1,4,5)

Lactic acid / AHAs

Chemical exfoliation + hydration support; introduce slowly if sensitive. ^(1,4,5)

Salicylic acid (BHA)

Helps clear follicular plugging; can be drying if overused. ^(1,4,5)

Topical retinoids

Can help some patients by normalising keratinisation, but may irritate and usually suit older teens/adults more than young children. ^(1,4,5) A practical rule: start with one active (2–3 nights/week), then increase frequency only if your skin stays comfortable.

In-clinic options

If you’ve been consistent for 8–12 weeks and KP is still bothering you (especially redness), we can step things up.

1. A structured routine plan (dermal therapist)

After your doctor review, a 40 minute dermal therapist appointment can be useful for:

• selecting the right urea/AHA/BHA approach for your skin sensitivity
• building a routine you can actually maintain
• reducing irritation and preventing “over-treatment”

2. Professional exfoliation options

Some patients benefit from carefully selected peels or professional exfoliation approaches, particularly if texture is the main concern (best done conservatively to avoid irritation). ⁽⁵⁾

3. Light and laser options (for selected cases)

Evidence for devices in KP is evolving; they are adjunctive and best for specific goals:

• Redness-dominant KP / KP rubra: pulsed dye laser (PDL) or intense pulsed light (IPL) may help erythema in some patients. ^(6–8)
• Texture / roughness: a randomised, sham-controlled trial found IPL improved roughness measures after a course of treatments. ⁽⁸⁾

A systematic review summarises the range of light/laser modalities studied for KP (study sizes are generally small and outcomes vary). ⁽⁷⁾ For a deeper explanation of lasers and light devices, see Laser & Light Treatments hub.

What makes KP worse

• dry weather / low humidity and winter flares ^(1,2)
• harsh soaps and hot showers ⁽⁵⁾
• aggressive scrubs or picking ⁽⁵⁾
• friction from tight clothing on affected areas

When to book

Book a review if:

• you’re unsure it’s KP (especially on the face)
• bumps become painful, pustular, rapidly changing, or very inflamed
• KP is significantly affecting confidence and you want a structured plan

If you’re browsing other “lumps and bumps”, see Other Dermatological Conditions.

Book

If you want a clear diagnosis and a plan that actually works for your skin, book a review at our Ivanhoe or Diamond Creek clinic.