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Eczema is an itch that rashes, not a rash that itches. Most people come in focused on the redness, but the scratching is what keeps the whole thing going. The skin gets damaged, the damage makes it itchier, and the cycle feeds itself. If we can break the itch, most of the rash follows.
The other thing I find myself saying every week is that moisturizer is not the boring part of the plan. It is the plan. Prescription creams settle a flare. Moisturizer is what keeps the next one from arriving. People who use it every day, whether or not the skin looks bad, do better over a year than people who only reach for it when things are already sore.
I also spend a lot of time on steroid fear. Strong steroids used on thin skin for months on end do have real downsides, which is why we match the strength to the body part and limit how long a course runs. Used the way they are prescribed, they are one of the safest tools we have. Undertreating a flare for months usually does more harm than treating it properly for two weeks.
— Dr. Schwarz, Board Certified Dermatologist
What It Is
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Eczema, also called atopic dermatitis, is a long-term inflammatory skin condition. Two things go wrong at the same time. The outer layer of skin, which is meant to hold water in and keep irritants out, is leaky. And the immune system in the skin is set to overreact, so ordinary things - soap, dust, sweat, a rough sweater - set off inflammation that would not bother anyone else.
The result is skin that is dry, itchy, and discolored or red, and often cracked. In a flare it can weep, crust and swell. Skin that has been scratched for a long time thickens, and the normal fine lines in it become deeper and more obvious. That thickening is called lichenification.
Where it shows up depends on age. In babies it favors the cheeks, the scalp and the outer surfaces of the arms and legs. In older children and adults it moves into the creases - the inside of the elbows, behind the knees, the neck, the wrists and the ankles. Adults often get it on the hands, the eyelids and around the mouth.
Eczema is not contagious, and it is not an allergy to one thing that can be found and removed. It runs in families, usually alongside asthma, hay fever and food allergy. Doctors group those together as the atopic conditions, which is where the name atopic dermatitis comes from.
Key Facts
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| How common | One of the most common skin conditions there is - roughly one in five children and a smaller share of adults |
| Who gets it | Usually starts before the age of five. Most common in people who also have asthma, hay fever or food allergy, or a family history of them |
| Curable or managed | Managed. Many children improve a lot by their teens, but the tendency to dry, easily irritated skin usually stays |
| Prescription needed | Often. Mild eczema can be held with moisturizer and over-the-counter hydrocortisone; anything more usually needs a prescription |
| Time to improve | A flare treated properly usually settles within one to two weeks |
Symptoms
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Acute Flare
Chronic and Thickened
Discoid
How It Looks by Skin Tone
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On deeper skin tones, eczema often does not look red. Inflamed skin looks violet, grey, dark brown, or simply darker than the skin around it, and the redness textbooks describe may not be visible at all. That matters, because eczema here is regularly scored as mild when it is not, and treated less than it should be. Feeling the skin - for warmth, thickening and roughness - is often more reliable than looking at its color.
Eczema on deeper skin tones is also more likely to appear as small bumps around the hair openings, which can be mistaken for goosebumps or for a rash of tiny pimples. It also shows up more often on the outer surfaces of the arms and legs rather than only in the creases, so the classic pattern may not be the one you have. What eczema leaves behind is usually the bigger complaint. Settled patches commonly heal into flat marks that are darker than the surrounding skin, and sometimes into lighter patches where pigment has dropped out. Both take months to even out, and the light patches usually take longer than the dark ones. Neither is a scar, and neither is caused by the treatment. Pigment returns on its own once the inflammation is fully controlled, so stopping inflammation early is what shortens the wait. Long-term scratching also thickens skin more readily on deeper skin tones, which is one more reason to treat the itch rather than live with it.
Where It Shows Up
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Causes
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Eczema (Atopic Dermatitis) — Mechanism figure
Eczema (Atopic Dermatitis) — Mechanism figure
Eczema (Atopic Dermatitis) — Mechanism figure
Eczema (Atopic Dermatitis) — Mechanism figure
Two systems are involved in eczema, and each one makes the other worse.
The first is the skin barrier. The outermost layer of skin is a wall of flat cells held together by fats. In eczema that wall is weak. Many people with eczema carry a change in a gene called filaggrin, which makes one of the proteins the wall is built from. A weak wall lets water escape, so the skin is dry, and lets irritants, allergens and bacteria in, so the immune system keeps meeting things it would otherwise never see.
The second is the immune system. In eczema the immune response in the skin is tilted toward a particular kind of inflammation, driven by immune signals with names like interleukin-4, interleukin-13 and interleukin-31. Those signals produce the swelling and discoloration, and they also act directly on nerve endings to produce itch. That is why eczema itches before there is much to see.
Then the loop closes. Itch leads to scratching. Scratching breaks the barrier further. A more broken barrier lets more in, and more inflammation follows. Scratched skin also loses its ability to hold off Staphylococcus aureus, a bacterium that sits harmlessly on most people's skin but grows heavily on eczema skin and drives the inflammation up again.
Nothing in this chain is caused by poor hygiene, and there is no single hidden allergy underneath it that can be found and removed.
Risk Factors
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Eczema is largely something you are born prone to. These are the things that make it more likely - not things anyone did wrong.
Course
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Eczema comes in flares. Skin is calm or nearly calm for a while, then there is a stretch of days or weeks when it is itchy, inflamed and sore, and then it settles again. Most people can eventually name their own pattern - the season, the stress, the job, the week before a period.
In children it usually begins before the age of five, and often in the first year. A large share of children improve substantially by school age, and more improve through the teenage years. It does not usually disappear cleanly. What tends to remain is dry, sensitive skin that flares under the right conditions. Hand eczema is a common adult version of that.
In adults with ongoing eczema, the pattern is more often chronic than episodic - a lower level of inflammation that never fully leaves, with flares on top of it. Patches that have been scratched for years become thickened and darker, and that thickening improves slowly once the itch is controlled.
Two things change the long-term course more than anything else: treating flares early rather than waiting them out, and keeping up daily moisturizer between flares. Neither is a cure. Both shorten the flares and lengthen the gaps between them.
What Makes It Worse
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There are essentially four things that drive eczema: (1) a leaky skin barrier, (2) an overactive immune reaction, (3) itching and scratching, and (4) bacteria growing on damaged skin.
Different triggers push on one or more of these steps, which is how an ordinary week turns into a flare. The diagram below shows the four steps, and the number next to each line shows which step that trigger affects.
Why does this matter? Because the treatment that helps most depends on what is driving your eczema. Skin that dries out every winter needs something different from skin that is inflamed and infected.
- Scratching The single biggest driver. It relieves the itch for a few seconds, breaks the barrier, and leaves the skin itchier an hour later. Scratching the same patch for months thickens it into skin that is hard to settle.13
- Long, hot showers and baths Heat strips out the fats that hold the barrier together, and skin is itchiest as it cools afterward. Short and lukewarm beats long and hot.13
- Soap, bubble bath and foaming cleansers Anything that foams heavily removes barrier fats. That includes most bar soaps, shower gels and antibacterial hand washes.1
- Stopping moisturizer Once the skin looks fine, this is the most common reason a flare comes straight back. The dryness returns first, the itch follows, and the rash arrives last.1
- Fragrance in skin and laundry products Perfume is one of the most frequent irritants in eczema, and it is in creams, detergents and fabric softeners alike.12
- Wool and rough or tight fabrics Physical irritation on skin that is already inflamed sets off itch directly.3
- Sweat and overheating Getting hot - exercise, a warm bedroom, too many layers at night - is one of the most reliable itch triggers there is.3
- Dry indoor air in winter Central heating drops indoor humidity, and for many people that alone is why eczema has a season.1
- Dust mites, pet dander and pollen Not the cause of eczema, but a genuine aggravator for some people, particularly those who also have hay fever or asthma.2
- Stress and poor sleep They do not cause eczema, but they raise the inflammation you already have and lower the threshold for scratching.23
- Bacteria on broken skin Weeping, yellow crusts, or a flare that suddenly gets much worse over a day or two usually means Staphylococcus aureus has taken hold. No amount of moisturizer fixes that on its own.4
- Frequent handwashing and glove use The main driver of hand eczema, and the reason it is so common in healthcare, food and cleaning work.1
- Stopping prescription treatment The moment it works is too soon to stop. Undertreated flares come back faster. Skin usually needs treatment for a few days past the point where it looks better.
What Makes It Better
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There are essentially four ways to improve eczema: (1) repair and protect the skin barrier, (2) calm the immune reaction, (3) break the itch and scratch cycle, and (4) reduce the bacteria growing on damaged skin.
Different treatments and habits work on one or more of these four steps. The diagram below shows each step, and the number next to each line shows which step that treatment or habit affects.
Why does this matter? Because matching the treatment to what is actually driving your eczema is what turns a routine that almost works into one that does.
- Moisturize generously, every day The foundation of everything else. Thick creams and ointments work better than lotions, and the amount matters more than the brand - most people use far too little. Apply within a few minutes of getting out of the shower, and again any time the skin feels tight.1
- Look for ceramides, glycerin or petrolatum These are the ingredients with the most behind them for holding water in and rebuilding the barrier. Fragrance-free, always.1
- A topical steroid for flares Use the right strength. Mild ones for the face, eyelids and skin folds; stronger ones for the body, hands and feet. Used for the length of a flare rather than indefinitely, this is still the most reliable way to settle inflamed skin.2
- Non-steroid prescription creams Tacrolimus, pimecrolimus, crisaborole, ruxolitinib cream and roflumilast cream calm inflammation without thinning skin, which makes them useful on the face, the eyelids and the folds, and for long stretches. They are usually slower to work and more expensive.2
- Proactive treatment on flare-prone spots Applying a prescription cream a couple of days a week to the areas that keep coming back is a standard way to lengthen the gaps between flares. Your doctor sets which areas and for how long.2
- Short, lukewarm showers Use a gentle non-foaming cleanser. Five to ten minutes, cleanser only where you need it, pat dry rather than rub, moisturizer straight afterward.1
- Treat the itch, not only the rash Cool compresses, a cooler bedroom, and a sedating antihistamine at night during a bad stretch all help. Antihistamines do little for the itch itself during the day.3
- Short nails, and cotton gloves at night Gloves matter most for children. Most scratching happens during sleep, when nobody can stop it. This limits the damage it does.3
- Cotton and loose clothing Cuts the physical triggering of itch through the day. Wash new clothes before wearing them.3
- Diluted bleach baths Use these only if your doctor recommends them. For eczema that keeps getting infected, a very dilute bleach bath a couple of times a week lowers the bacteria on the skin. Get the dilution from your doctor rather than from the internet.4
- Treat infection when it is actually there Weeping, honey-colored crusts or a sudden bad turn usually needs an antibiotic alongside the eczema treatment.4
- A humidifier in winter Modest, but real for people whose eczema is clearly seasonal and clearly worse indoors.1
- Injected and oral treatments These are for severe eczema. Dupilumab, tralokinumab, lebrikizumab and the oral JAK inhibitors are for eczema that covers a lot of the body or has not responded to creams used properly. They are prescription-only and need specialist supervision.2
- Treat early A flare caught in its first few days takes a fraction of the treatment that the same flare takes after two weeks.
Dermatologist’s Take
Almost every difficult eczema case I see comes down to one of two things: not enough moisturizer, or not enough treatment for long enough.
People are usually applying about a third of what they need, once a day, and stopping the prescription cream the moment the color fades. The skin looks better before it is better. The inflammation underneath is still there, which is why the flare is back within a week.
So if your eczema is not settling, check the boring things before you change products. How much moisturizer are you actually getting through in a week. How hot are your showers. Does anything in your routine have fragrance in it, including the laundry detergent. How many days did you really use the prescription. Fixing those solves more cases than switching brands does.
— Dr. Schwarz, Board Certified Dermatologist
Myths
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- “Eczema is caused by poor hygiene.” It is not. Eczema is an inherited difference in the skin barrier and the immune system. Washing more does not help, and washing with harsh soap makes it worse.
- “Eczema is contagious.” It is not You cannot catch it or pass it on by touch, in a pool, or by sharing a bed or a towel.
- “It is an allergy - we just need to find the food.” For most people there is no single trigger to find. Food allergy and eczema often occur in the same person, especially in young children, but cutting foods out rarely clears eczema, and unnecessary elimination diets carry their own risks. Test when there is a clear, repeatable reaction to a specific food, not as a fishing expedition.
- “Topical steroids are dangerous and should be avoided.” Strong steroids used on thin skin for long stretches can thin the skin, which is why strength is matched to body area and courses are limited. Used the way they are prescribed, they are safe and effective. Leaving a flare undertreated for months does more damage than treating it properly for two weeks.
- “Moisturizer is just for comfort.” Over a year it is the treatment that does the most work. Daily moisturizer reduces how often flares happen and how much prescription cream you end up needing.
- “Children always grow out of it.” Many improve a great deal, and some clear completely. But the tendency to dry, easily irritated skin usually stays, and eczema can return in adulthood, often on the hands.
- “Natural products are gentler.” Plant oils and essential oils are among the most common causes of allergic reactions in people with eczema, and some plant oils make the barrier worse rather than better. Fragrance-free matters far more than natural.
Your Routine
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Pick the tile that looks most like yours and we’ll show you a sample skincare routine.
And what is your skin like the rest of the time?
Dermatologist’s Take
The two questions I get most are which moisturizer to buy and how often to use the prescription cream. There is no single right answer. The routine has to be adjusted to how your skin is actually responding.
If your routine is stinging, burning or making things redder - step back. That usually means the products, not the eczema.
- Switch to a fragrance-free thick cream or an ointment instead of a lotion
- Drop every product with a fragrance, including laundry detergent and fabric softener
- Cleanse with a non-foaming wash, and only where you need it
- Apply moisturizer first and let it settle before the prescription cream, if the prescription stings
- Put aside anything with alcohol, essential oils or plant extracts while the skin is broken
- Skin that is broken or weeping stings with almost everything. That usually needs treating, not a gentler moisturizer
If your routine is not doing enough - the eczema is unchanged after two weeks of treating it properly - it is time to turn it up.
- Use more moisturizer, more often. Twice a day is the floor, not the ceiling
- Move from a lotion to a cream, or from a cream to an ointment
- Ask whether the steroid strength matches the body part. A mild steroid rarely clears thick eczema on the hands or shins
- Keep using the prescription cream for a few days past the point the skin looks better
- Ask about proactive maintenance on the spots that always come back
- If it is weeping or crusting, ask about infection before you add another cream
- Eczema that covers a lot of your body, or has not responded to creams used properly, is a reason to ask about the injected and oral options
The best routine is not the strongest one. It is the one you will actually do every day, because the daily part is what keeps the flares apart.
— Dr. Schwarz, Board Certified Dermatologist
Over-the-Counter Products
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Everything here you can buy without seeing anyone. Filter to one kind, or leave it to see them all.
No over-the-counter options match that type yet.
Prescriptions
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Pick the tile above that looks most like yours and this list narrows to what suits it. The basics stay put - a gentle cleanser, a moisturizer and a daily sunscreen are right whichever kind you have.
These need a prescription. Filter to one kind, or leave it to see them all.
No prescription treatments match that type yet.
Procedures
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These are done in the office, usually over several visits. Filter to one kind, or leave it to see them all.
No procedures match that type yet.
When to See a Doctor
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Most eczema does not need a specialist. It does need more than moisturizer if moisturizer alone has not held it.
Book if over-the-counter hydrocortisone and daily moisturizer have not settled things within two weeks, if the itch is waking you or your child at night, if the skin is weeping or crusting yellow, if a patch keeps returning to the same spot, if it is on the eyelids or the genitals, or if it is getting in the way of school, work or mood. Go the same day if there are painful blisters or punched-out sores spreading quickly, or a fever alongside a spreading rash. A herpes virus infection on eczema skin, called eczema herpeticum, is uncommon but is treated urgently.
The visit gets you a steroid strength matched to the body part rather than guessed at, a plan for what to do the next time it flares rather than only what to do today, treatment for infection if infection is there, and access to the non-steroid creams and the injected options if creams have not been enough.
How It's Diagnosed
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Eczema is diagnosed by looking, not by testing. A dermatologist is matching a pattern: itch that came first, dry skin, inflammation in the places typical for your age, a history of flares that come and go, and often asthma, hay fever or food allergy in you or in your family. That combination is enough to make the diagnosis in most people.
There is no blood test that confirms eczema. Allergy blood tests and skin prick tests are often raised in people with eczema, which tells you the immune system is atopic. It does not tell you the eczema is caused by anything on the list. Testing is worth doing when there is a clear, repeatable reaction to something specific.
Two other tests come up. A swab is taken when skin is weeping or crusting, to see which bacteria are growing and whether they will respond to the usual antibiotic. Patch testing - small amounts of common allergens taped to the back and read over several days - is used when eczema starts in adulthood, sits in an unusual pattern, or stops responding to treatment that used to work. Contact allergy to a preservative, a fragrance, or even to a cream being used to treat the eczema can sit on top of it.
A skin biopsy is uncommon. It is done when the diagnosis is genuinely in doubt, usually to separate eczema from psoriasis, from a fungal infection, or from rarer conditions that imitate it.
Complications
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Eczema (Atopic Dermatitis) — Complication
Eczema (Atopic Dermatitis) — Complication
Lookalikes
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Eczema (Atopic Dermatitis) — Lookalike
Eczema (Atopic Dermatitis) — Lookalike
Eczema (Atopic Dermatitis) — Lookalike
Questions Patients Ask
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Will my child grow out of eczema?
Many children improve a great deal by school age, and more improve through the teenage years. Complete and permanent clearance happens, but it is not the rule. What usually remains is dry, easily irritated skin that can flare again later in life, often on the hands. Treating it well in childhood does not guarantee it goes, but it does mean fewer flares, less scratching, and less thickened skin along the way.
Are topical steroids safe for my child?
Used the way they are prescribed, yes. The rules that keep them safe are simple: mild strengths on the face, eyelids and skin folds, stronger ones reserved for the body and limbs, and courses that run for the length of a flare rather than indefinitely. The problems that people worry about - thinned skin, stretch marks - come from strong steroids used on thin skin for months without review. If you are using one more or less continuously, that is the point to go back and ask about a non-steroid option instead.
Is a food causing this?
Usually not, and this is one of the most common wrong turns. Food allergy is more common in children with eczema than in other children, but that is because both come from the same atopic tendency, not because the food is driving the rash. Removing foods rarely clears eczema, and long elimination diets can cause nutritional problems and can even make a true allergy more likely. If a food causes a clear, repeatable reaction within a couple of hours, that is worth investigating. A vague suspicion is not.
Why is it so much worse at night?
Several things line up after dark. Body temperature rises slightly in the evening, and heat is a direct itch trigger. The distractions that kept you from noticing the itch are gone. Natural cortisol, which damps inflammation, is at its lowest overnight. And scratching during sleep is unconscious, so the damage accumulates without anyone stopping it. A cooler bedroom, moisturizer right before bed, short nails, and cotton layers all help more than they sound like they should.
Can I use the same cream on my face?
Not always. Facial skin, and eyelid skin especially, is much thinner than the skin on your arms and legs, and absorbs more of whatever you put on it. A steroid strong enough for your shins can thin the skin around the eyes within weeks. Face and eyelid eczema is usually treated with a mild steroid for a short stretch, or with one of the non-steroid creams that can be used long term. Ask before transferring a body prescription to your face.
Do I still need moisturizer when the skin looks normal?
Yes, and this is the single habit that separates people who flare four times a year from people who flare monthly. Skin that looks normal in eczema is still leaky - the barrier defect is there whether or not there is a rash. Moisturizer applied daily on calm skin is what keeps the next flare further away and smaller when it comes. It is maintenance, not first aid.
References
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- Chu DK, Schneider L, Asiniwasis RN, et al. Atopic dermatitis (eczema) guidelines: 2023 American Academy of Allergy, Asthma and Immunology/American College of Allergy, Asthma and Immunology Joint Task Force on Practice Parameters GRADE- and Institute of Medicine-based recommendations. Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology. 2024. — Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology, 2024
- Wollenberg A, Kinberger M, Arents B, et al. European Guideline (EuroGuiDerm) on atopic eczema: Living update. Journal of the European Academy of Dermatology and Venereology. 2025. — Journal of the European Academy of Dermatology and Venereology : JEADV, 2025
- Wollenberg A, Kinberger M, Arents B, et al. European guideline (EuroGuiDerm) on atopic eczema: part I - systemic therapy. Journal of the European Academy of Dermatology and Venereology. 2022. — Journal of the European Academy of Dermatology and Venereology : JEADV, 2022
- Drucker AM, Lam M, Prieto-Merino D, et al. Systemic Immunomodulatory Treatments for Atopic Dermatitis: Living Systematic Review and Network Meta-Analysis Update. JAMA dermatology. 2024. — JAMA dermatology, 2024
- Vassilopoulou E, Comotti A, Douladiris N, et al. A systematic review and meta-analysis of nutritional and dietary interventions in randomized controlled trials for skin symptoms in children with atopic dermatitis and without food allergy: An EAACI task force report. Allergy. 2024. — Allergy, 2024
- Yepes-Nuñez JJ, Guyatt GH, Gómez-Escobar LG, et al. Allergen immunotherapy for atopic dermatitis: Systematic review and meta-analysis of benefits and harms. The Journal of allergy and clinical immunology. 2023. — The Journal of allergy and clinical immunology, 2023