← All comparisons
Dermapedia / CompareConditions

Keratosis Pilaris vs Rosacea

Keratosis pilaris is rough, bumpy skin caused by plugged hair follicles. It is a texture problem first and a redness problem second, and it is classically on the upper arms and thighs. Rosacea is flushing and lasting redness on the middle of the face. Rosacea can also cause bumps and pustules. A field of rough follicular bumps favors keratosis pilaris, but texture alone cannot confirm the diagnosis.

At a glance

The differenceKeratosis PilarisRosacea
What it isKeratin plugs blocking hair folliclesOverreactive blood vessels and inflammation
What it looks likeTiny bumps in a rough patchRedness across the centre of the face
How it feels to touchRough, like fine sandpaperFlushing, sometimes with bumps
Does it itch or hurtUsually notStings and burns
What it does over timeFades with agePersists and can worsen

Keratosis Pilaris

Upper arm skin covered in small rough bumps.

Keratosis pilaris makes small rough bumps, most often on the upper arms and thighs.

Rosacea

Close-up of a cheek with spreading redness.

Rosacea causes lasting redness across the cheeks and nose, sometimes with visible vessels.

Side by side

The differences that matter

14 comparison points

What it is

Keratosis Pilaris

Keratin plugs blocking hair follicles

Keratin, the protein in the surface of the skin, builds up and plugs the opening of each follicle. Every bump is one blocked follicle with a trapped hair inside.

Rosacea

Overreactive blood vessels and inflammation

Blood vessels in the central face widen too easily and stay widened. Inflammation follows, and in some people that adds bumps and pustules.

What it looks like

Keratosis Pilaris

Tiny bumps in a rough patch

Small skin-coloured, red or brown bumps packed evenly over a patch, one per follicle. There may be pink around them, but the bumps are the main event.

Rosacea

Redness across the centre of the face

Flushing that comes and goes at first, then a lasting pink or red over the cheeks, nose, chin and forehead. Fine visible blood vessels often appear in it.

How it feels to touch

Keratosis Pilaris

Rough, like fine sandpaper

This is the single most useful difference. Close your eyes and run a finger over it and the texture is unmistakable.

Rosacea

Flushing, sometimes with bumps

Flushed rosacea skin feels normal, or sometimes tight and dry. Where there are pustules they are separate spots, not an even grain.

Size

Keratosis Pilaris

One to two millimetres

Each bump is about the size of a pinhead, and they are all much the same size.

Rosacea

Facial color changes, sometimes with bumps

Redness covers whole areas of the face. Any spots are pinhead to small-pea sized and scattered.

Does it itch or hurt

Keratosis Pilaris

Usually not

It can itch a little when the skin is dry, especially in winter. Most people notice how it feels rather than how it stings.

Rosacea

Stings and burns

Rosacea skin often stings with skincare, feels hot during a flush, and reacts to products other people tolerate. Eyes can feel gritty too.

Where it shows up

Keratosis Pilaris

Upper arms and thighs

Backs of the upper arms first, then the fronts of the thighs and the buttocks. In children and teenagers it also appears on the cheeks, which is where it gets confused with rosacea.

Rosacea

The middle of the face

Cheeks, nose, chin and centre of the forehead. It spares the skin around the eyes and the sides of the face.

What sets it off

Keratosis Pilaris

Dry skin and cold weather

Worse in winter, better in summer. Nothing you eat or drink changes it.

Rosacea

Heat, sun, alcohol and spicy food

Also hot drinks, exercise, cold wind and stress. Triggers vary, and most people can name their own within a few weeks.

What it does over time

Keratosis Pilaris

Fades with age

It often starts in childhood, peaks in the teens, and settles down through the twenties and thirties. It is harmless throughout.

Rosacea

Persists and can worsen

Rosacea is a long-term condition. Flushing tends to become fixed redness over years, and untreated inflammation can thicken the skin of the nose in a small number of people.

Treatment

Keratosis Pilaris

Moisturise, then exfoliate gently

A thick moisturiser is the base. Add a cream with urea, lactic acid, glycolic acid or salicylic acid to loosen the plugs. It improves the texture while you use it, and returns when you stop.

Rosacea

Trigger control and prescription creams

Sunscreen and gentle cleansing come first. Metronidazole, azelaic acid or ivermectin cream treat the bumps. Brimonidine narrows vessels for a few hours, and laser or intense pulsed light treats fixed redness and visible vessels.

Cost

Keratosis Pilaris

Low

Drugstore moisturisers and acid creams, no prescription needed.

Rosacea

Low to moderate

Prescription creams are inexpensive. Laser and light treatment is a course of clinic visits and is usually cosmetic.

Touch tells you more than sight

Keratosis Pilaris

The rough texture is a useful clue to keratosis pilaris. The surface has an even grain to it, because every follicle in the patch is plugged. It feels like the back of a nail file or the skin of a plucked chicken.

Rosacea

Rosacea can have a smooth or bumpy surface. Some people have mainly flushing and visible vessels; others develop bumps and pustules. Compare the full pattern rather than relying on touch alone.

Why cheeks cause the confusion

Keratosis Pilaris

Keratosis pilaris on the cheeks is common in children and young adults. It makes red, slightly rough cheeks that look permanently windburnt. That looks like early rosacea in a photograph, and it is often treated as rosacea for months before someone touches it.

Rosacea

Rosacea is uncommon before the late twenties. It usually starts between 30 and 50. A red-cheeked eight-year-old almost never has rosacea, and very often has keratosis pilaris.

What each treatment does, and does not do

Keratosis Pilaris

Keratosis pilaris improves with moisture and gentle chemical exfoliation. Urea and lactic acid soften the plugs so the follicle can clear. Scrubbing harder only makes the skin redder. It does not make it smoother. And the bumps come back within weeks of stopping.

Rosacea

Rosacea improves with trigger control and prescription creams. Nothing on a drugstore shelf reduces the redness for long. Sunscreen does the most work of anything, because sun is the most common trigger.

Further reading

Common questions

Questions Patients Ask

How do I tell keratosis pilaris from rosacea on the cheeks?

Touch it. Keratosis pilaris feels rough, like fine sandpaper, because every hair follicle in the patch is plugged. Rosacea can cause flushing with or without bumps and pustules. Also check the backs of the upper arms, where keratosis pilaris almost always shows up too.

Can a child have rosacea?

It is rare. Rosacea usually starts between 30 and 50. Red, rough cheeks in a child or teenager are far more often keratosis pilaris.

Can you have both at once?

Yes. Keratosis pilaris on the arms and rosacea on the face can occur in the same person, and each is treated separately.

Does keratosis pilaris go away?

It usually fades through the twenties and thirties. Creams with urea, lactic acid or salicylic acid smooth it while you use them, but the bumps come back when you stop.

Will exfoliating my cheeks help red bumpy skin?

Only if the bumps are keratosis pilaris, and even then gently. Acid creams and scrubs on rosacea skin usually cause stinging and more redness.

What is the single most useful sign?

A field of rough follicular bumps favors keratosis pilaris; flushing and visible vessels favor rosacea. Neither clue confirms a diagnosis by itself.