If you have ever noticed tiny, rough bumps on the backs of your arms, thighs, or buttocks that feel like sandpaper, you are probably dealing with keratosis pilaris -- commonly known as KP or chicken skin. It affects up to 40% of adults and is extremely common in teenagers, yet many people have no idea what it is or that it is treatable.

What causes keratosis pilaris?

KP occurs when keratin, the protein that protects your skin, builds up and forms plugs in the hair follicles. These plugs create the characteristic small, rough bumps. The condition is genetic and is often associated with dry skin, eczema, and allergies. It is not caused by poor hygiene, and it is not contagious. KP typically appears on the upper arms, thighs, buttocks, and sometimes the cheeks.

Treatment step 1: Chemical exfoliation

The most effective treatment for KP is consistent chemical exfoliation to dissolve the keratin plugs. Look for body lotions and washes containing urea (10% to 20%), lactic acid (10% to 15%), glycolic acid, or salicylic acid. These ingredients dissolve keratin buildup without the micro-tears caused by physical scrubs.

Treatment step 2: Intense hydration

After exfoliating, apply a rich, emollient moisturizer. Products containing ceramides, shea butter, or squalane help strengthen the skin barrier and prevent the dryness that worsens KP. Apply moisturizer within minutes of showering while your skin is still slightly damp.

Treatment step 3: Adjust shower habits

Hot water strips the skin of its natural oils and worsens KP. Use lukewarm water and limit showers to 10 minutes. Choose gentle, fragrance-free body washes -- harsh soaps and scrubs can trigger inflammation and make the bumps more prominent.

What not to do with KP

Do not pick at or scratch the bumps -- this can cause scarring and hyperpigmentation. Avoid harsh physical exfoliants like rough loofahs or sugar scrubs. Do not expect overnight results -- consistent treatment for 4 to 8 weeks is needed before visible improvement.

While KP cannot be permanently cured (it is genetic), it can be effectively managed with the right routine. Many people find their KP improves significantly in summer when humidity is higher. Consistent use of chemical exfoliants and rich moisturizers can keep the bumps smooth year-round.