First Aid Beauty KP Bump Eraser Review: Does the 10% AHA Scrub Work?

First Aid Beauty KP Bump Eraser Body Scrub is a rinse-off body scrub that pairs pumice with 10% AHA (glycolic and lactic acids) to smooth the rough bumps of keratosis pilaris. It's a reasonable once- or twice-a-week step for KP on the arms and thighs, and the original version has no fragrance on its ingredient list. It won't clear KP on its own: dermatologists warn that scrubbing can worsen it, and a leave-on moisturizer with urea or lactic acid does most of the daily work.

Before you buy, you can scan the jar's barcode or label with the ingredient scanner in Pori to see how its ingredients are flagged for your skin.

Below we go through the full ingredient list, what the evidence says about acids and scrubs for KP, who should buy it and who should skip it, sizes and price per ounce as of November 2026, how to use it safely, and four alternatives. We compared published ingredient lists, brand claims and listed prices; we did not test these products on skin.

What is First Aid Beauty KP Bump Eraser?

It's a body scrub from First Aid Beauty (FAB), sold in a jar. FAB describes it as a chemical and physical exfoliating body scrub designed to reduce the look of keratosis pilaris with 10% AHA and pumice buffing beads, and calls it America's number one body exfoliator, citing 2025 prestige sales data. If you're not sure your bumps are KP, start with our keratosis pilaris guide.

What's in KP Bump Eraser? The full ingredient list

FAB lists the original version's ingredients as pumice, water, glycolic acid, sodium cocoyl isethionate, lactic acid, dimethicone, stearic acid, cetearyl alcohol, sodium hydroxide, palmitic acid, glycerin, C12-15 alkyl benzoate, sorbitol, colloidal oatmeal, tocopherol, Chrysanthemum parthenium (feverfew) extract, Camellia sinensis leaf extract, Glycyrrhiza glabra (licorice) root extract, Salix nigra (willow) bark extract, bisabolol, hydrogenated coconut acid, xanthan gum, steareth-20, steareth-21, myristic acid, sodium isethionate, phenoxyethanol, potassium sorbate, sodium benzoate, Leuconostoc/radish root ferment filtrate and EDTA. Grouped by job:

• Pumice: the first ingredient, a fine volcanic powder that physically buffs off dead skin.
• Glycolic acid and lactic acid: alpha hydroxy acids that loosen the bonds between dead skin cells. FAB gives the combined AHA level as 10% without splitting it between the two.
• Sodium cocoyl isethionate and sodium isethionate: mild cleansing agents, so the scrub also washes the skin.
• Sodium hydroxide: adjusts pH, partly neutralizing the acids.
• Conditioning base: dimethicone, stearic acid, palmitic and myristic acids, cetearyl alcohol, glycerin, sorbitol and C12-15 alkyl benzoate, which leave skin feeling less stripped after rinsing.
• Soothing and antioxidant extras: colloidal oatmeal, bisabolol, tocopherol, green tea, licorice root and feverfew extracts. FAB labels the scrub parthenolide-free; parthenolide is a compound found in feverfew.
• Willow bark extract: a plant extract; at this position it's a minor ingredient.
• Texture and preservation: xanthan gum, steareth-20 and steareth-21, phenoxyethanol, potassium sorbate, sodium benzoate, a radish root ferment filtrate and EDTA.

There's no fragrance on the original's list. FAB also sells scented versions, such as Toasted Coconut, so check the label if you react to fragrance.

Does KP Bump Eraser work for keratosis pilaris?

What dermatologists recommend for KP

The American Academy of Dermatology (AAD) says treatment cannot cure keratosis pilaris, so you treat it to keep the bumps under control. Its list of helpful exfoliating ingredients includes alpha hydroxy acid, glycolic acid, lactic acid, a retinoid, salicylic acid or urea, and it recommends moisturizers with urea or lactic acid. If you see no improvement after 4 to 6 weeks, it suggests telling your dermatologist. The acids in this scrub are on that list.

The scrub problem

The AAD's self-care advice also says to avoid scrubbing your skin, which tends to irritate the skin and worsen keratosis pilaris, and to use loofahs and rough washcloths only gently. A pumice scrub is a physical exfoliant, so the way you use it matters: light pressure, short contact, and no more than FAB's once or twice a week. Our guide to physical vs chemical exfoliants explains the trade-off.

Rinse-off acids vs leave-on acids

The best-known AHA study used a leave-on lotion: people applied 5% or 12% lactic acid twice a day for 3 months; both improved skin smoothness, and 12% also thickened the epidermis and dermis. A scrub sits on the skin for a minute or two before you rinse it off, so expect a smaller acid effect than from a lotion you leave on. That's why the AAD's KP plan leans on a daily moisturizer with urea or lactic acid. Our lactic acid guide and urea cream guide cover those.

FAB's results

FAB reports that in a consumer perception test of 38 people over 10 days, 92% of panelists with KP said their skin felt exceptionally smooth, 95% said it felt softer than ever, and 95% said it got rid of dry, flaky skin. These are self-reported impressions from a short brand study, without a comparison product.

Sun sensitivity

The FDA notes that AHAs can make skin more sensitive to the sun. In one study, four weeks of AHA use increased sensitivity to UV redness by 18 percent, and the effect was gone a week after stopping. The FDA's suggested label warning advises sunscreen, protective clothing and limiting sun exposure while using an AHA product and for a week afterward. The FDA also cites an expert panel that considers glycolic and lactic acid products safe at 10% or less with a pH of 3.5 or greater; this scrub's 10% is at that limit.

Who is KP Bump Eraser for, and who should skip it?

It suits you if you:

• Have mild KP on the arms, thighs or buttocks and want smoother-feeling skin quickly.
• Like a two-in-one wash and exfoliant you use once or twice a week in the shower.
• Want a fragrance-free option; the original version has no fragrance on its list.
• Will follow it with a moisturizer, which the AAD says KP needs.

Look elsewhere if you:

• Have red, inflamed KP: scrubbing can make it worse. A leave-on lotion with urea or lactic acid is gentler.
• Have broken, sunburned, freshly shaved or waxed skin: acids plus pumice will sting.
• Want to use it on your face: FAB sells it as a body scrub. Facial KP and facial texture need gentler products; our KP guide covers the face.
• Already use another acid or a retinoid on the same areas: stacking exfoliants raises the odds of irritation.
• Have eczema-prone skin: scrubs and acids can irritate it. Ask a dermatologist first.

How much does KP Bump Eraser cost?

As of November 2026, firstaidbeauty.com lists the original version at $30 for 8 oz and $12 for 2 oz, and the scented Toasted Coconut 10 oz jar at $36.

The 2 oz jar is a cheap way to see how your skin handles pumice plus acids before you buy the 8 oz.

How do you use it?

1. Use it in the shower once or twice a week, no more.
2. Massage a small amount over the bumpy areas with light pressure, then rinse well.
3. Skip any area that's irritated, broken or freshly shaved.
4. Pat dry and apply a moisturizer within 5 minutes, as the AAD advises for KP; it suggests a thick cream with urea or lactic acid.
5. Keep showers under 20 minutes in warm water, and use a mild cleanser on the days you don't scrub.
6. Use sunscreen on treated skin that sees daylight, including for a week after you stop.

If your skin gets raw or very dry, the AAD suggests stopping the exfoliant for a few days. For more on pacing acids, see our glycolic acid guide.

What are the best alternatives to KP Bump Eraser?

• First Aid Beauty KP Smoothing + Brightening Body Lotion: the leave-on partner, with 10% lactic acid, urea, colloidal oatmeal and ceramide for $36. It's scented with peach and lists orange peel oil, limonene and linalool, so skip it if fragrance bothers you.
• Eucerin Roughness Relief Lotion: 10% urea, fragrance-free, in a 16.9 fl oz bottle; a leave-on choice that matches the AAD's urea advice.
• CeraVe Renewing SA Cleanser: a fragrance-free salicylic acid wash that CeraVe says suits the face and body, at $15.99 on cerave.com. It exfoliates without grit.
• CeraVe Moisturizing Cream: a fragrance-free ceramide cream to apply after any KP exfoliant; see our CeraVe Moisturizing Cream review.

FAB's Ultra Repair Cream is another popular follow-up moisturizer; our Ultra Repair Cream review and First Aid Beauty guide cover the rest of the line.

Is First Aid Beauty KP Bump Eraser worth it?

As a weekly smoothing step, it's a sensible product at a fair price: about $3.75 an ounce for a fragrance-free scrub with acids dermatologists list for KP. Its limits are built in. Acids that rinse off after a minute do less than a leave-on lotion, and pumice is the part dermatologists warn about if you scrub hard or often. Use it gently once or twice a week, pair it with a urea or lactic acid moisturizer every day, and see a dermatologist if your bumps don't improve after 4 to 6 weeks.