Last updated: 25 July 2026 · ~6 min read · By the Imbas editorial team
TL;DR: The most common eczema triggers – fragrance and preservatives – hide in shampoo, laundry, and wipes, not just your face cream. If you’ve fixed your skincare and your eczema still flares, the trigger may not be on your skincare shelf at all. The two ingredients most likely to bother reactive skin — fragrance and preservatives (especially MI) — live in shampoo, laundry detergent, wipes, perfume, and hand soap, not just creams. None of this means those products are dangerous, and it almost certainly isn’t every product you own. A trigger is rare — that’s exactly why finding yours is useful rather than frightening. Read the back of the label, and change one thing at a time.
You’ve done everything right. You switched to a gentle, fragrance-free cleanser. You found a moisturiser your skin likes. And your eczema still flares — on your arms, your neck, the backs of your knees — and you can’t work out why. Here’s a possibility worth sitting with: the trigger may not be on your skincare shelf at all.
Your skin spends far more of the day in contact with things we never think of as “skincare” — the shampoo that runs down your back in the shower, the detergent residue in every shirt and pillowcase, the wipe you clean your hands with, the perfume on your scarf. And the two ingredients most likely to bother reactive skin live in all of those.
Why do the same two eczema triggers keep coming up?
Quick Answer: Because fragrance and preservatives are formulation basics, not skincare-specific — anything wet and scented can contain them. When dermatologists patch-test people for skin reactions, these two categories come up again and again as the most relevant allergens in everyday consumer products [Dermatitis; skintherapyletter.com].
Fragrance is the single most common cause of allergic contact dermatitis from cosmetic products [Cheng & Zug, Dermatitis 2014]. To be precise about the numbers: fragrance allergy affects an estimated 0.7–2.6% of the general population, and among people already being patch-tested for a suspected skin allergy, 5–11% react to a fragrance mix [PubMed 32475515]. That second figure is higher because it’s measured in people who already suspect a problem, not a share of everyone. But the pattern is clear: if reactive skin reacts to one thing, fragrance is the most likely thing.
Preservatives are the other. They keep water-based products from growing bacteria — genuinely useful, and most people never react. But methylisothiazolinone (MI) became common enough in the 2010s that the American Contact Dermatitis Society named it Contact Allergen of the Year for 2013 as reactions climbed [Castanedo-Tardana & Zug, Dermatitis 2013; PubMed 23340392]. It’s used in shampoos, liquid soaps, wipes, and household cleaners — not creams.
Key takeaway: The two things most likely to flare your skin aren’t special or rare ingredients. They’re basics, which is why they turn up everywhere.
Which everyday products should I actually check?
Quick Answer: The ones your skin spends real time touching and you never think to suspect — laundry, shampoo and body wash, wipes, perfume, and hand soap. None is “bad.” Each is simply a place a fragrance or preservative you react to could be hiding.
Where to look, and why each spends time against your skin. Guidance per the National Eczema Association and American Academy of Dermatology; allergen framing per the sources listed. Retrieved July 2026.
| Product | Why it touches your skin | What to check on the back |
|---|---|---|
| Laundry detergent + fabric softener | Residue on every shirt, sheet, and towel, around the clock — the one people miss most | Fragrance-free and dye-free; skip scented softener/dryer sheets [NEA; AAD] |
| Shampoo + body wash | Runs over scalp, back, and shoulders daily, then rinses — reactive skin can still react in short contact | Fragrance; a preservative; strong foaming surfactant |
| Wet wipes | Used where skin is most delicate — hands, face, a baby’s bottom | Fragrance; MI/MCI (a documented past route [PubMed 24420805]) |
| Perfume + scented body mist | Fragrance at its most concentrated, on thin neck/wrist skin where flares appear | It is fragrance — the number-one suspect if that’s where skin objects |
| Hand soap, sanitiser, cleaners | Frequent contact, usually fragranced | Fragrance; sometimes the same isothiazolinones |
We go deeper on the two biggest ones: why your laundry might be flaring your eczema and what to know about wipes and sensitive skin.
Key takeaway: Start with the products your skin touches most and thinks about least — your laundry, your shampoo, your soap.
But it says “sensitive” / “natural” / “unscented” — doesn’t that mean it’s safe?
Quick Answer: Not reliably. Those three words feel reassuring and don’t promise what people assume. The front of a pack is a claim; the ingredient list on the back is the fact.
- “Unscented” is not “fragrance-free.” Unscented products can contain a masking fragrance added to hide a raw smell — so an “unscented” label can still carry the very thing reactive skin reacts to. Fragrance-free means free of added fragrance; both the AAD and FDA draw this line [AAD, aad.org]. The full distinction is here.
- “Natural” isn’t automatically gentle. Essential oils are fragrance too — Europe now requires around 80 fragrance allergens, many botanical, to be named on labels [Reg. (EU) 2023/1545]. Why that happened is here.
Key takeaway: Trust the back of the pack, not the adjective on the front.
How do I find my trigger without turning my life upside down?
Quick Answer: Two calm steps — read the back, not the front, and change one thing at a time. You don’t need to bin everything or memorise ingredient names.
- Read the back, not the front. The INCI list is where fragrance (“Parfum,” “Fragrance,” or a named essential oil) and preservatives actually show up, regardless of what the front promises. Presence isn’t proof a product is your problem, but it tells you what’s there to consider.
- Change one thing at a time. If you swap your detergent and your shampoo and your soap at once and improve, you’ll never know which mattered. Change one, give it a couple of weeks, and let your skin tell you.
If a flare doesn’t settle, or you want to know exactly what you react to, a dermatologist can patch-test you — the only way to confirm an allergen rather than guess [AAD, aad.org].
Key takeaway: One change, two weeks, then judge. Patience beats a purge.
Frequently asked questions
What everyday products can trigger an eczema flare? The usual suspects sit outside your skincare shelf: laundry detergent and fabric softener, shampoo and body wash, wet wipes, perfume, and hand soap. They share the two ingredients reactive skin reacts to most — fragrance and preservatives like MI. None is dangerous, and it almost certainly isn’t all of them; a trigger is rare, which is why finding it is worthwhile.
Can laundry detergent really cause eczema flare-ups? It doesn’t cause eczema, but fragranced or dyed detergent residue can flare reactive skin, because it sits on every shirt and sheet against your skin around the clock. Both the National Eczema Association and the AAD recommend fragrance-free and dye-free detergent and skipping scented softeners [NEA; AAD]. It’s one of the most overlooked triggers precisely because nobody suspects it.
Is “unscented” safe for eczema? Not necessarily. “Unscented” is not “fragrance-free.” An unscented product can contain a masking fragrance added to hide a raw smell, so it may still carry the exact thing you react to. For eczema-prone skin, look for fragrance-free and confirm there’s no Parfum on the ingredient list.
How do I know which product is flaring my skin? Change one thing at a time. Swap a single suspect — most usefully your detergent — to a fragrance-free, dye-free version, re-wash what touches your skin most, and give it two to three weeks. Changing several products at once tells you nothing about which one mattered. To confirm a specific allergen rather than guess, a dermatologist can patch-test you.
Does “natural” or “essential oil” mean gentler for eczema? No. Essential oils are fragrance, and fragrance is the most common thing sensitive skin reacts to. The EU now requires around 80 fragrance allergens, many of them botanical, to be named on labels [Reg. (EU) 2023/1545]. Read a “natural” product the same way you’d read any other — on the back.
Scan the whole cabinet, not just the cream
This is exactly what Imbas is for. You’re not meant to hold 80 fragrance names and a list of preservatives in your head. Point it at any label — shampoo, detergent, wipes, the perfume you’re not sure about — and it reads the ingredients for your concern, and it’s as clear about what’s fine as about what’s worth a second look. Most of what you scan will come back reassuring. The useful part is the one thing that doesn’t. Imbas is launching soon — join the waitlist →
Start with the products your skin touches most and thinks about least — your laundry, your shampoo, your soap. The fix for a flare you’ve been chasing for months might be sitting in your utility room.
New here? Start with how to read any label for eczema.
General information, not medical advice. If your skin is painful, weeping, or not improving, see a doctor or dermatologist.
