Is Eczema a Gut Problem? What a Dermatology PA Wants Parents to Know

If your child has eczema, you know it's not "just a rash." It's the scratching at 2am. The dark circles under their eyes. The onesie you put on your toddler so they'll stop clawing at their own skin. It's exhausting for them and for you.

We sat down with Rebecca Leighton, a physician assistant who has worked in dermatology for 13 years, to ask the questions we hear from parents all the time. Here's what she told us, plus what we've seen on the gut side.

Is eczema just a skin problem?

Sometimes, yes. And sometimes it's a sign of something going on deeper.

Rebecca sees two broad pictures in her clinic. The first is mild eczema in the usual spots: the inside of the elbows, the backs of the knees, maybe a bit on the face. A lot of the time she thinks of that as the skin reacting to something it's touching, like a detergent, a fragrance or a body wash that isn't right for it.

The second is what she calls "pan eczema," where the skin is red, inflamed and itchy almost everywhere. That's the picture that tells her this is more than skin deep.

In her words, the skin gives us red flags. Literally red flags. The more widespread and stubborn it is, the more she starts looking inside the body for answers.

Will my child grow out of eczema?

This is probably the most common thing parents get told. And for mild cases, it can be true. Rebecca pointed to large studies following thousands of children that show kids with mild eczema usually don't go on to bigger problems.

But there's an important exception. About a third of kids with eczema go on to what's called the "atopic march." First it's eczema, then allergies, then asthma.

Part of the reason is that broken-down skin lets things in that shouldn't get in. Toddlers get food all over themselves. When that food touches skin that's already irritated and open, the immune system can start treating that food as a threat.

When to look for more help:

• You've switched to sensitive skin products and it isn't getting better.
• A prescribed steroid cream helps for a bit, then it comes right back.
• It's spreading beyond the usual spots.
• It's affecting sleep, eating or mood.

If any of those are true, Rebecca's advice is simple. See a dermatologist. If the first one doesn't help, see another. Different providers approach things differently. If your gut feeling as a parent says this isn't right, keep looking.

What can I do at home to calm eczema down?

Rebecca's first goal with every eczema patient is to cool the skin down and repair the barrier. Kids can't heal if they can't sleep.

Start here:

1. Audit everything that touches their skin. Laundry detergent, body wash, lotion, sunscreen, even what you use on your own skin if you're holding them a lot. Rebecca asks about every single one of these at a first visit. Be careful with products labeled "gentle" or "for eczema." Some of them aren't, according to the research she relies on.
2. Go fragrance-free across the board. Fragrance is one of the most common irritants she sees.
3. Write it all down before your appointment. What you've tried, what helped, what made it worse, and what products you use now. The more history you bring, the faster a good provider can help.

And one big one: be careful with social media advice. A lot of it is "this worked for my kid," which may have nothing to do with what's going on with yours.

Could food be causing my child's eczema?

It can be part of it, and sometimes a big part.

Rebecca learned this the hard way with her own son. As a baby he had terrible reflux, constant diarrhea and the worst diaper rash she'd ever seen, and she sees skin all day for a living. She tested for infections, tried every cream and ointment, and nothing worked. What finally caught her eye was that the rash wasn't spread like a normal diaper rash. It was coming from where the stool was. That pointed her to the gut.

After working through an elimination diet, testing at 16 months showed a corn allergy. He'd never had a dramatic allergic reaction, so nobody had suspected it.

Here's what surprised her. Corn is in almost everything. It's in sauces, snacks and a lot of products labeled gluten-free, because when companies take the gluten out they often replace it with corn. It was even in his children's ibuprofen and Tylenol, which are suspended in corn syrup. Her local pharmacist ended up weighing out pure ibuprofen powder for him.

If you suspect food:

1. Start a food and skin journal. Write down what they eat and how their skin looks over the next day or two. Patterns show up faster than you'd think.
2. Learn to read labels, not just front-of-package claims. "Gluten-free" doesn't mean free of everything else. If you can't pronounce half the ingredients, that's a good place to start swapping.
3. Ask about a compounding pharmacy if medicine is an issue. They can make medications without the fillers your child reacts to. Most people don't know this is an option.

Do I have to throw out my whole pantry?

Please don't. We had one mom spend $1,400 at the grocery store in a single weekend after clearing out everything. She was desperate, and we understand why. But you don't need to do it all at once.

Swap one thing at a time. Diana walked that same mom through it by putting two labels side by side on a screen. A regular cracker next to one made from real ingredients. A typical ranch dressing next to a cleaner one. Once you see the difference, it gets easier to spot.

Her daughter was noticeably better within a few weeks.

What does the gut have to do with eczema?

A lot more than most people realize.

Babies are actually born with a "leaky" gut. That's normal. Over roughly the first year, the gut lining gets stronger and more selective about what it lets through, the immune system matures and the body learns to make more digestive enzymes. When eczema shows up hard in that first year, Rebecca says her mind goes straight to the gut.

That same little girl whose mom cleared out the pantry is a good example. She'd improved a lot with skin care from Rebecca and food changes with Diana, but it wasn't fully gone. When we ran a stool test, her immune system was in overdrive. Her inflammation markers were through the roof. She had an overgrowth of H. pylori, a bacteria that lives in the upper digestive tract. And there were signs that her body was struggling to clear out waste from the bacteria in her gut, which can add to what shows up on the skin.

This was a whole-body issue, not a skin issue. Once we worked on her gut, liver support and nervous system, her mom told us something we'll never forget: they weren't waking up all night to put on creams anymore.

Should I be scared of eczema medications?

This one depends on your child and is a conversation for your dermatologist. But Rebecca wanted parents to know a couple of things.

There are a lot more options now than just steroid creams, including newer non-steroid creams and injections for severe cases. Many parents are afraid of injections because of the side effects they've heard about, but not all of these medications work the same way. Rebecca explained that some of the newer ones aren't immune suppressing the way older drugs are. Ask your provider exactly how the one they're suggesting works.

For the little girl above, Rebecca saw a medication as a bridge, not a forever plan. It could keep her comfortable and sleeping while the deeper work happened. Medical care and gut work aren't either/or. The best results we see come from a team.

Where to start this week

If your child has eczema, here's what we'd do first:

1. Swap to fragrance-free detergent, soap and lotion.
2. Start a simple food and skin journal.
3. Book a dermatologist if it's widespread, stubborn or affecting sleep, and bring your notes.

Your child's skin is telling you something. You don't have to figure out what on your own.