Rough, bumpy skin is very common, and the usual cause is a harmless condition called keratosis pilaris. It shows up as small, hard bumps, most often on the upper arms and thighs, though it can appear almost anywhere. There is no overnight fix. A consistent routine of the right actives, though, makes a real difference to how the skin looks and feels. This article explains what causes keratosis pilaris, what it can be confused with, and the treatments that genuinely help.
What is Keratosis Pilaris?
Often nicknamed “chicken skin”, keratosis pilaris is a harmless, non-contagious condition that produces tiny rough bumps. The bumps are usually skin-coloured, sometimes a little red, and they rarely itch or hurt. They appear most often on the upper arms, thighs, buttocks and cheeks. They can also affect the chest, back, forearms and lower legs. The only places it cannot appear are the palms and soles, since those areas have no hair follicles. It is extremely common, particularly in children and teenagers, and it often eases with age.
What Causes Keratosis Pilaris?
Keratosis pilaris is a genetic disorder of keratinisation. That is the process by which skin makes keratin, the tough protein that forms its protective outer layer. In keratosis pilaris, excess keratin builds up around the opening of a hair follicle and forms a plug. That plug traps the fine hair beneath it, and you can sometimes see a small coiled hair underneath the bump. The result is the rough, raised papules that cluster around the follicles.
The exact trigger for the keratin buildup is not fully understood, but research points to a genetic basis. The condition is also strongly linked with dry skin and atopic conditions like eczema, asthma and hay fever. It also tends to flare in winter, when cold air and low humidity dry the skin. For people with skin of colour, the plugged follicles can also leave the skin looking darker or more uneven.
What Other Conditions Cause Rough and Bumpy Skin?
Keratosis pilaris has a fairly distinctive look, but several other conditions can resemble it. If you are not sure what you are dealing with, see a doctor. The right treatment depends on the right diagnosis.
- Folliculitis: This is inflammation of the hair follicles, usually from a bacterial or fungal infection. Unlike keratosis pilaris, it can be itchy or painful and often shows red, pustule-like bumps.
- Atopic dermatitis: Also known as eczema, this causes itchy, inflamed skin that can look dry and scaly and sometimes carries tiny bumps.
- Acne: This involves the oil glands and produces a range of lesions including whiteheads, blackheads and inflamed spots. It mainly affects the face, but also the neck, back and chest.
- Molluscum contagiosum: This viral infection causes round, firm, usually painless bumps that can occasionally turn itchy or red.
- Heat rash: Also called prickly heat or miliaria, this comes from blocked sweat ducts and brings small, itchy red bumps.
- Pityriasis rubra pilaris: This rare condition causes red, scaly patches containing small bumps and can thicken the skin on the palms and soles.
- Ichthyosis vulgaris: This genetic condition leads to dry, scaling skin and sometimes small bumps.
- Psoriasis: This chronic autoimmune condition speeds up the skin cell cycle and forms scaly, red patches that can be itchy or sore.
- Darier’s disease: Also called keratosis follicularis, this genetic condition causes rough, warty, greasy-looking bumps, especially on the chest, back, ears and forehead.
How Can You Reduce Keratosis Pilaris Triggers?
Keratosis pilaris is largely genetic, but certain things make it more obvious. Reducing these triggers will not cure it, but it does improve how the skin looks and helps your treatments work better.
- Dry weather: The bumps are often more visible in cold, dry weather, when low humidity pulls moisture from the skin.
- Dry skin: Dryness worsens the roughness, which is why keratosis pilaris so often sits alongside conditions like eczema.
- Hormonal changes: Some women find their keratosis pilaris becomes more visible during menopause, pregnancy or the menstrual cycle, which suggests a possible hormonal link.
- Friction: Constant rubbing from tight clothing can irritate the skin and make the condition worse.
- Harsh soaps and skincare: Products that strip the skin or disrupt its barrier aggravate keratosis pilaris, so swap harsh soaps for gentle, moisturising cleansers.
- Over-exfoliation: Gentle exfoliation helps, but aggressive scrubbing inflames the skin and makes the bumps worse.
- Allergies: A few people link flare-ups to specific allergens, though this is a less common and less well-understood trigger.
What Skincare Treats Keratosis Pilaris?
Beyond avoiding triggers, skincare is the mainstay of treatment. The most effective approach combines gentle chemical exfoliation with rich hydration, and adds prescription strength where needed.
- Exfoliating acids: Gentle keratolytic acids dissolve the keratin plugs and lift away dead cells. Look for body creams with alpha hydroxy acids, beta hydroxy acids or urea. Use a soft cloth in the shower rather than a harsh scrub.
- Moisturisers: Rich, hydrating and occlusive moisturisers are key. Look for urea, lactic acid, glycerin and ceramides. Apply straight after bathing, while the skin is still damp, to lock in water.
- Retinoids: Over-the-counter retinol speeds up cell turnover and smooths texture. Prescription retinoids like tretinoin are far stronger and also fade the hyperpigmentation that keratosis pilaris can leave. Other options include adapalene and tazarotene.
- Topical steroids: These are not a first-line treatment and will not clear keratosis pilaris. A doctor may, though, prescribe a short course to calm areas that are very red and inflamed.
What Professional Treatments Can Help?
Skincare does most of the work, but some in-clinic procedures can improve stubborn cases. City Skin Clinic is an online clinic that provides prescription topical treatments. The procedures below are done in person by a qualified practitioner rather than by us. They are best thought of as an add-on to a good routine.
- Chemical peels: A chemical peel applies an acid solution to exfoliate the surface and smooth texture. A mild to medium glycolic or lactic acid peel is usual for keratosis pilaris.
- Microdermabrasion: This non-invasive procedure buffs away the outer layer of dead skin cells with a handheld device. That can leave the skin feeling smoother.
- Laser therapy: Certain laser treatments target redness and texture, with pulsed light and fractional lasers among the more common choices.
- Dermaplaning: This exfoliating treatment uses a sterile blade to scrape away the top layer of dead skin. It is mainly used on the face, but sometimes on small patches of keratosis pilaris.
- Photodynamic therapy: This two-step treatment applies a light-sensitising agent and then a specific wavelength of light. It is more often used for acne, but is occasionally tried for severe keratosis pilaris.
Can You Get Rid of Keratosis Pilaris?
It helps to be realistic. Treatment can clearly improve how keratosis pilaris looks and feels, but it may not clear it completely. The bumps can also return if you stop. The encouraging part is that the condition usually fades with age, and a consistent routine of exfoliating acids and rich moisturisers keeps most cases well controlled in the meantime. Mild cases respond well to over-the-counter skincare, more stubborn ones benefit from prescription retinoids, and in-clinic procedures are an optional extra for the most persistent skin. See a doctor if your bumps are severe, sit on delicate areas like the face or groin, or you are not certain of the diagnosis.
At City Skin Clinic, we are passionate about personalised skincare. Keratosis pilaris responds best to a steady routine of exfoliating and hydrating actives, and stubborn cases often benefit from prescription-strength retinoids. Our online skin clinic offers safe and effective custom skincare treatments, and where appropriate our doctors use ingredients such as tretinoin and azelaic acid to treat skin conditions like acne, hyperpigmentation, melasma and skin ageing. To start your personalised skincare plan, book a virtual video consultation or use our online consultation form. The journey towards great skin starts here.
This article is intended for general informational purposes only and is not a substitute for medical advice, diagnosis or treatment. Always consult a qualified medical provider for any medical concerns or questions you might have.
