September’s shift from warm, breezy days to central heating and colder air can leave keratosis pilaris — those small, rough bumps often found on the upper arms, thighs and legs — looking more noticeable than ever. The right blend of chemical exfoliants and nourishing ingredients can smooth texture, reduce redness and leave skin feeling genuinely soft again. Here are four KP treatments worth adding to your routine this month.
1. Joonbyrd Kaleidoscope Smoothing Body Serum 100ml
Clinically proven to treat keratosis pilaris, this whipped body serum has been independently trialled with 91% of users seeing an improvement in skin softness within six weeks.
- Formula: A blend of shikimic acid and azelaic acid to gently exfoliate and refine tone, paired with blueberry seed oil and polyglutamic acid for antioxidant protection and deep hydration.
- Finish: Whipped and quenching, leaving skin soft to the touch with a subtle floral scent of jasmine, peony and vanilla.
- Good to know: Backed by a clinical trial of 30 participants and a user trial of 109 participants over 42 days of daily use; also available in a 15ml size.
2. The INKEY List Glycolic Acid Exfoliating Body Stick 45g
A mess-free, rinse-free solid stick that glides straight onto problem areas, making it an easy addition to a September shower routine without extra steps.
- Formula: 7% glycolic acid smooths and softens rough, bumpy skin, while 0.5% salicylic acid unclogs pores and 10% shea butter delivers instant nourishment.
- Finish: Non-sticky and non-oily, absorbing quickly without needing to be washed off.
- Good to know: In a four-week consumer study of 100 people, it visibly improved dry, cracked heels in as little as three days and reduced ingrown hairs after seven.
3. First Aid Beauty KP Bump Eraser Body Scrub with 10% AHA 283.5g
Purpose-built for keratosis pilaris-prone skin, this dermatologist-recommended scrub combines chemical and physical exfoliation for a genuinely smoother finish.
- Formula: Glycolic and lactic acids chemically exfoliate while pumice beads physically buff away dead skin, with soothing bisabolol to calm and hydrate.
- Finish: Freshly buffed and comfortable, never stripped or tight.
- Good to know: Use 1–2 times a week after cleansing, then follow with moisturiser; also available in 56.7g and 226g sizes.
4. First Aid Beauty Soft + Smooth Starter Kit – Body Bestsellers
For anyone wanting a complete routine in one go, this three-step kit tackles bumps, texture and ingrown hairs together.
- Formula: KP Bump Eraser Body Scrub with 10% AHA (116g), KP Smoothing Body Lotion with 10% AHA in Fresh Peach (28g), and 28 Ingrown Hair Pads with glycolic and salicylic acid.
- Finish: Exfoliated and hydrated, with the daily lotion keeping texture refined between scrub days.
- Good to know: Use the scrub 1–2 times weekly, the lotion daily, and the pads after shaving or waxing to target ingrown hairs specifically.
From a clinically-proven Korean serum to a complete three-step starter kit, these four treatments cover every angle of keratosis pilaris care as the seasons turn this September.