If you've ever run your hand along the back of your arm and felt a patch of small, rough bumps... you probably already know the nickname.
Chicken skin.
It has a way of showing up uninvited, usually on the upper arms, thighs, or backside, and stubbornly staying no matter how much you scrub. If you've tried everything from exfoliating mitts to prescription treatments and still found yourself pulling on a cardigan in July, this post is for you.
I had keratosis pilaris my entire life. I tried everything - including a sulfur treatment prescribed by my dermatologist in high school - and nothing made a dent. Then, somewhere in the early years after James and I moved out to the farm, I noticed it had quietly disappeared. I didn't think much of it at first. But then customers at the farmers market started telling us the same thing - that our goat's milk soap had cleared up the bumps they'd had for years. That's when it clicked.
Here's what I understand now that I didn't then.
What Is Keratosis Pilaris?
Keratosis pilaris (KP) is a common, completely harmless skin condition where small plugs of keratin - the same protein that makes up your hair and nails - build up inside hair follicles, creating tiny raised bumps on the skin's surface.
It's not acne and it's not a hygiene issue. KP is thought to be caused by a genetic mutation in a protein called filaggrin, which causes the skin to produce too much keratin. That excess keratin plugs the hair follicles, creating the characteristic bumps. The condition often runs in families and is especially common in people who also experience eczema or dry skin.
Estimates suggest KP affects somewhere between 40–50% of adults and up to 80% of adolescents, making it one of the most common skin conditions there is. Most people just don't talk about it, which makes it feel lonelier than it should.
The bumps are often skin-colored, slightly red, or can look a bit like acne with a white tip and the skin around them can feel rough or sandpapery to the touch. They tend to be more noticeable in winter when skin is drier, and they can improve - or disappear entirely - with age. But for many people, they're a persistent presence through their 20s, 30s, and beyond.
Why Most Treatments Make It Worse
Here's the thing about KP: it looks like something you should be able to scrub away. And so the instinct is usually to do exactly that - exfoliate harder, use stronger products, strip the skin back.
That approach almost always backfires.
Harsh scrubs and aggressive exfoliants can inflame the hair follicles, which makes the bumps more red and more noticeable, not less. Strong soaps strip the skin's natural moisture barrier, leading to more dryness, which in turn makes the keratin buildup worse. The skin doubles down on what it was already doing.
What KP actually responds to is the opposite: gentle, consistent exfoliation paired with real hydration. Not stripping - just steady, nourishing support.
The Lactic Acid Connection
The most well-researched topical treatment for KP - and the one dermatologists reach for most - is lactic acid, an alpha-hydroxy acid (AHA) that gently dissolves the bonds between dead skin cells without the inflammation that physical scrubbing can cause.
In a survey of board-certified dermatologists, topical lactic acid was found to be the most commonly used first-line therapy for KP, cited by over 43% of respondents. Lactic acid breaks down and dissolves the bonds between dead skin cells, making it easier for the skin to shed them and unclog hair follicles - reducing the appearance of bumps and improving overall texture. It also acts as a humectant, drawing water into the skin and helping to soften the keratin buildup at the source.
The key word in all of this is gentle. Research has shown that lactic acid molecules enhance the skin's natural moisturizing factors while simultaneously breaking down keratin plugs - addressing both primary symptoms of KP at once. That dual action - exfoliate and hydrate at the same time - is what makes it so much more effective than approaches that only address one or the other.
So why did goat's milk soap make my chicken skin dissapear?
Why Goat's Milk Works
Goat's milk is naturally rich in lactic acid. Not synthetic lactic acid added to a formula - lactic acid that occurs naturally as part of the milk itself, at a concentration that's effective but inherently gentle. Because lactic acid occurs naturally in goat milk, goat milk skincare products offer a gentle alternative to commercial lactic acid products.
That gentleness matters for KP specifically. Because the skin affected by KP tends to be sensitive and reactive, the approach that works isn't the most aggressive one - it's the most consistent one. Daily use of something mild and nourishing, over time, produces results that one harsh treatment never will.
Beyond the lactic acid, goat's milk brings fatty acids that replenish the skin's lipid barrier, vitamins A and E that support skin cell renewal, and naturally anti-inflammatory proteins that help calm the redness that often accompanies KP bumps. It does several things at once, gently, every time you use it.
For me, the results weren't dramatic or overnight. They were gradual - one day I realized the bumps were just... gone. Our customers describe the same experience.
What Our Customers Are Saying
We started hearing about this at the farmers market years ago, and we've never stopped. Here are a few of the reviews that have come in recently:
"The soaps are amazing. The smell is very subtle and lasts for a long time. The best part is that my skin is healed. I have suffered from keratosis pilaris since I was an adult and all the special creams I have bought OTC and prescribed have never healed it. I can not believe that using this soap in 3 weeks has dramatically cleared up my arms."
— Norma R.
"I used to have keratosis pilaris on my arms - the annoying red bumps you sometimes see on people's back arms. I've had them since as long as I could remember. Since I started using these soaps, those annoying red bumps are now starting to disappear. And for the first time in well, EVER, I now have smooth back arms. I no longer am embarrassed to show my back arms!"
— Daisy C.
"I have always had bumps on the back of my arms, but this soap has made them so much better! I keep my house stocked with Little Seed Farm products."
— Olivia H.
How to Use Goat's Milk Soap for Keratosis Pilaris
A few things that seem to make the biggest difference:
Be consistent. This is the most important one. Daily use - even a simple lather and rinse in the shower - is more effective than occasional intensive treatments. The lactic acid does its work gradually and cumulatively.
Don't scrub. Work up a lather and let it sit on the skin for a moment before rinsing. The chemistry does more than the friction ever will. Aggressive scrubbing can inflame the follicles and set you back.
Follow with moisture. After cleansing, while skin is still slightly damp, apply a gentle moisturizer. Keeping skin hydrated helps the lactic acid work more effectively and prevents the dryness that can make KP worse. Essential Body Oil is a beautiful option here - massage a few drops into damp skin right after the shower for deep nourishment without heaviness. If you want to build on the lactic acid benefits of the soap, the Goat's Milk Moisturizer is another excellent choice. Though created for the face, it's also wonderful on KP-prone areas of the body, helping extend the moisturizing and gentle exfoliating benefits of the soap while supporting a smoother-looking skin texture.
Give it time. Most people notice a real difference within four to six weeks of daily use. Some see changes sooner. Patience is part of the process.
For KP specifically, our plain Goat's Milk Soap (Unscented) is a gentle starting point because there's no added fragrance or botanicals that could potentially irritate reactive skin. If your skin tolerates fragrance well, any of our goat's milk bars will deliver the same lactic acid benefits.
Keratosis Pilaris is one of those conditions that tends to get normalized - "just something I have to live with" - when in reality, the right gentle approach can make a meaningful difference. Not a cure, and not overnight - but real, gradual improvement that builds with consistency.
If you've been pulling on cardigans in summer longer than you'd like, it might be worth giving your skin something simpler and softer than whatever you've tried before. 💛