Eczema (Atopic Dermatitis): Types, Triggers, Treatments, and the Functional Medicine Approach

If you or your child has eczema, you already know the drill. The itching that wakes you at 2 a.m. The cracked, bleeding skin that stings in the shower. The frustration of trying cream after cream, diet after diet, wondering if anything will actually work.

You are not alone. Eczema is one of the most common skin conditions on the planet. And while there is no single magic cure, there is a lot more you can do about it than you might think.

This guide covers everything: the different types of eczema, what causes flares, how conventional medicine treats it, and what regenerative and functional medicine approaches are showing real promise. Whether you are newly diagnosed or have been battling eczema for decades, this is written for you.

What Is Eczema, Exactly?

Eczema is an umbrella term for a group of conditions that make the skin inflamed, itchy, and often cracked or blistered. The most common form is atopic dermatitis, which accounts for the majority of eczema cases and is closely linked to the “atopic triad” of eczema, asthma, and allergic rhinitis (hay fever).

At its core, eczema is a problem with the skin barrier. Think of healthy skin like a brick wall: skin cells are the bricks, and lipids (fats) are the mortar holding everything together. In eczema, that mortar is defective. The wall has gaps. Moisture escapes, and irritants, allergens, and bacteria get in.

This triggers an immune overreaction, primarily driven by T-helper 2 (Th2) cells. The immune system sounds the alarm even when the threat is minor, creating a cycle of inflammation, itching, scratching, and more inflammation. Researchers call this the “itch-scratch cycle,” and breaking it is one of the central goals of treatment.

The Six Main Types of Eczema

Not all eczema looks or behaves the same. Here are the six primary types, each with distinct features and triggers.

1. Atopic Dermatitis

This is the big one. Atopic dermatitis (AD) usually starts in infancy or early childhood and often runs in families with a history of allergies, asthma, or hay fever. It tends to appear on the cheeks and scalp in babies, the creases of elbows and knees in older children, and the hands, neck, and eyelids in adults.

AD is a chronic condition. Some children outgrow it by adolescence, but many carry it into adulthood. Severity ranges from mild dry patches to widespread, weeping, crusted plaques that seriously impact quality of life.

2. Contact Dermatitis

This type flares when your skin touches something it does not like. There are two subtypes:

• Irritant contact dermatitis: Caused by direct chemical damage from substances like detergents, solvents, or frequent hand washing. No allergy involved.
• Allergic contact dermatitis: A true immune-mediated reaction to a specific substance, such as nickel, fragrance, latex, or poison ivy. It takes prior sensitization, meaning you will not react the first time, but once your immune system is primed, even tiny exposures can trigger a rash.

3. Dyshidrotic Eczema (Pompholyx)

Small, intensely itchy blisters appear on the palms, sides of fingers, and soles of the feet. It can be triggered by stress, sweating, contact with metals like nickel or cobalt, or seasonal allergies. The blisters may take weeks to resolve, and the skin often peels and cracks as they dry out.

4. Nummular Eczema (Discoid Eczema)

Coin-shaped (nummular) patches of irritated skin, usually on the legs, arms, or torso. These round lesions can be quite stubborn and are sometimes mistaken for ringworm. Nummular eczema is more common in men and tends to show up after skin injuries like insect bites or burns. Dry skin in winter is a frequent trigger.

5. Seborrheic Dermatitis

This affects areas rich in oil glands: the scalp, face (especially around the nose, eyebrows, and ears), and upper chest. In infants, it is called “cradle cap.” The yeast Malassezia, which naturally lives on the skin, plays a role in driving the inflammation. Flares are common during cold weather, stress, or illness.

6. Stasis Dermatitis (Venous Eczema)

This type develops on the lower legs due to poor blood circulation, specifically chronic venous insufficiency. Blood pools in the leg veins, pressure builds, and fluid leaks into the surrounding tissue, causing swelling, discoloration, itching, and eventually eczema. If untreated, it can lead to skin ulcers. It is most common in older adults and people with a history of blood clots or varicose veins.

Causes and Triggers: Why Does Eczema Happen?

Eczema is not caused by one single thing. It results from a collision of genetics, immune dysfunction, environmental exposures, and lifestyle factors. Here is how they interact.

Genetics and the Skin Barrier

Up to 50% of people with moderate-to-severe atopic dermatitis carry mutations in the filaggrin gene (FLG). Filaggrin is a protein that helps build and maintain the outermost layer of skin. Without enough of it, the skin barrier is compromised from the start.

But genetics are not destiny. Plenty of people with filaggrin mutations never develop eczema, and many eczema patients have normal filaggrin genes. That is where environment and lifestyle come in.

Immune System Imbalance

In atopic dermatitis, the immune system is skewed toward a Th2 response. This means it produces too much of certain inflammatory molecules (like interleukin-4, interleukin-13, and interleukin-31) and not enough of the antimicrobial peptides that protect against infection. The result: inflamed skin that is also prone to bacterial and viral infections.

Common Triggers

• Dry air and low humidity (winter months are notorious)
• Harsh soaps, detergents, and fragrances
• Allergens: dust mites, pet dander, pollen, mold
• Food sensitivities (especially dairy, eggs, wheat, soy, and nuts in children)
• Stress (raises cortisol, which can worsen skin barrier function)
• Heat and sweating
• Certain fabrics (wool, synthetic materials)
• Infections: Staphylococcus aureus colonizes the skin of roughly 90% of AD patients
• Hormonal shifts (many women notice flares around their menstrual cycle or during pregnancy)

Recognizing the Symptoms

The hallmark symptom across all types of eczema is itch. In atopic dermatitis, the itch often precedes the rash. Patients describe it as relentless, deep, and maddening. Scratching provides momentary relief but worsens the inflammation.

Beyond itching, here is what to look for:

• Dryness: The skin feels rough, tight, and flaky, even between flares
• Redness and inflammation: Active patches are pink to dark red (or may appear brown, purple, or ashen gray on darker skin tones)
• Oozing and crusting: In acute flares, the skin may weep clear fluid and form yellowish crusts
• Thickened skin (lichenification): Chronic scratching causes the skin to become thick, leathery, and deeply lined
• Cracking and fissures: Deep cracks that can bleed and sting, especially on hands and feet
• Sleep disruption: The itch is often worst at night, leading to chronic sleep deprivation

Conventional Treatments: What Mainstream Medicine Offers

Let’s walk through the treatment ladder, from first-line options to the newest advanced therapies.

Step 1: Moisturizers (Emollients)

This is the foundation of all eczema care. A good emollient repairs the skin barrier, locks in moisture, and reduces the need for medicated treatments. Apply generously at least twice daily, and always within a few minutes after bathing.

Look for fragrance-free, dye-free options. Ointments (like petroleum jelly) are more effective than creams, and creams are more effective than lotions. Some newer “prescription emollients” contain skin barrier repair ingredients like ceramides and palmitoylethanolamide (PEA).

Step 2: Topical Corticosteroids

These remain the go-to treatment for eczema flares. They work by suppressing the local immune response and reducing inflammation quickly.

Steroids come in seven potency classes, from mild (hydrocortisone 1%) to super-potent (clobetasol propionate 0.05%). The general rule: use the lowest potency that controls the flare, for the shortest time needed. Thicker skin areas like palms and soles can handle stronger steroids; thinner skin like the face and eyelids requires milder formulations.

Common concerns: Skin thinning, stretch marks, and rebound flares with long-term use. These risks are real but often overstated for short-term, appropriate use. The bigger problem in practice is steroid phobia, where patients under-treat flares out of fear and end up worse off.

Step 3: Topical Calcineurin Inhibitors (TCIs)

Tacrolimus (Protopic) and pimecrolimus (Elidel) are non-steroidal anti-inflammatory creams that work by blocking calcineurin, an enzyme involved in T-cell activation. They are especially useful for sensitive areas like the face, eyelids, and groin where long-term steroid use is not ideal.

They can cause a temporary burning or stinging sensation when first applied. This usually fades after a few days. The FDA placed a black box warning about a theoretical lymphoma risk in 2006, but large-scale studies since then have not confirmed an increased risk with normal use.

Step 4: PDE4 Inhibitors

Crisaborole (Eucrisa) is a topical phosphodiesterase-4 (PDE4) inhibitor approved for mild-to-moderate atopic dermatitis. It is another steroid-free option, though some patients find it stings on application and its efficacy is modest compared to mid-potency steroids.

Step 5: Phototherapy

Narrowband UVB phototherapy (delivered in a dermatologist’s office two to three times per week) can be very effective for widespread eczema that is not adequately controlled with topical treatments alone. It works by suppressing the overactive immune cells in the skin and has a strong safety and efficacy track record.

Step 6: Systemic Therapies

For moderate-to-severe eczema that does not respond to topical treatments and phototherapy, systemic (whole-body) medications enter the picture.

The Regenerative and Functional Medicine Approach

Conventional treatments focus on controlling symptoms from the outside in. Regenerative and functional medicine asks a different question: what is driving the inflammation from the inside out?

This is not about rejecting conventional treatments. It is about layering in strategies that address root causes, support the body’s own healing systems, and potentially reduce the need for long-term medications. The best outcomes often come from combining both approaches.

The Gut-Skin Axis: Your Microbiome Matters

One of the most exciting areas of eczema research involves the gut. The connection is straightforward: roughly 70% of your immune system lives in and around your gut. When the gut microbiome is disrupted (a state called dysbiosis), it can shift the immune system toward the Th2 dominance that drives eczema.

Multiple studies have found that infants who develop eczema tend to have less diverse gut bacteria, with lower levels of beneficial species like Bifidobacterium and Lactobacillus, and higher levels of potentially harmful bacteria like Clostridium difficile and Staphylococcus.

The concept of “leaky gut” (increased intestinal permeability) also applies here. When the gut lining becomes too permeable, food proteins and bacterial toxins enter the bloodstream and trigger systemic immune activation, which can worsen skin inflammation.

Probiotics

The evidence for probiotics in eczema is most convincing for prevention. A landmark meta-analysis published in the Journal of Allergy and Clinical Immunology found that giving probiotics to pregnant women and their infants reduced the risk of eczema by about 20-25%.

For treating existing eczema, results are more mixed. The strains with the best evidence include:

• Lactobacillus rhamnosus GG
• Lactobacillus reuteri
• Bifidobacterium lactis
• Multi-strain combinations

Not all probiotics are created equal. Strain, dose, and timing all matter. The research suggests that multi-strain formulas given at adequate doses (at least 1 billion CFU daily) for a minimum of 8-12 weeks are most likely to show benefit.

Evidence: Moderate

Elimination Diets and Food Sensitivities

Food does not cause eczema. But in a subset of patients, especially children under five, food sensitivities can trigger or worsen flares. The most common culprits are:

• Cow’s milk
• Eggs
• Wheat
• Soy
• Peanuts and tree nuts
• Fish and shellfish

The gold standard for identifying food triggers is a supervised elimination diet followed by controlled reintroduction. Remove the suspected food completely for 4-6 weeks, then reintroduce it and monitor for flares.

A word of caution: do not eliminate multiple food groups long-term without guidance from a qualified practitioner. Overly restrictive diets, especially in growing children, can lead to nutritional deficiencies. IgG food sensitivity panels are widely marketed but have not been validated as reliable tools for guiding eczema treatment.

Evidence: Moderate (for targeted elimination in children with confirmed food allergy)

Vitamin D

Vitamin D plays a direct role in skin barrier function and immune regulation. It stimulates the production of antimicrobial peptides (like cathelicidin) that help fight off the Staphylococcus aureus colonization so common in eczema.

Multiple studies have found that eczema patients tend to have lower vitamin D levels, and that supplementation can improve symptom severity, particularly during winter months when levels naturally drop. A randomized controlled trial in the Journal of Allergy and Clinical Immunology found that 1,000 IU of vitamin D daily significantly reduced winter eczema severity in children.

Practical recommendation: Get your blood levels tested. The sweet spot for most people is a serum 25(OH)D level of 40-60 ng/mL. Most adults will need 2,000-5,000 IU of vitamin D3 daily to reach that range, though individual needs vary.

Evidence: Strong

Omega-3 Fatty Acids (Fish Oil)

Omega-3 fatty acids (EPA and DHA) from fish oil have well-established anti-inflammatory properties. They compete with pro-inflammatory omega-6 fatty acids for incorporation into cell membranes, and they give rise to specialized pro-resolving mediators (SPMs) that actively turn off inflammation.

The clinical evidence for fish oil in eczema is encouraging but not overwhelming. Some studies show meaningful improvements in itch and severity scores, while others show modest or no benefit. The dose likely matters. Most positive studies used at least 1-3 grams of combined EPA and DHA daily.

Even if the direct skin benefits are modest, omega-3 supplementation supports overall immune balance, cardiovascular health, and mental health, all of which are relevant for people living with a chronic inflammatory condition.

Evidence: Moderate

Red Light Therapy (Photobiomodulation)

Red light therapy uses low-level wavelengths of red and near-infrared light (typically 630-850 nm) to stimulate cellular repair and reduce inflammation. Unlike UV phototherapy, it does not carry a risk of skin cancer or accelerated aging.

The mechanism is well understood at the cellular level: red and near-infrared light is absorbed by cytochrome c oxidase in the mitochondria, boosting ATP production and triggering a cascade of anti-inflammatory and tissue-repair signaling. For eczema specifically, it can:

• Reduce localized inflammation
• Accelerate wound healing in cracked, fissured skin
• Modulate immune cell activity
• Improve blood flow to affected areas

Clinical data specifically for eczema is still building, but the evidence for red light therapy in wound healing and general skin inflammation is solid. Many patients report improvement in skin texture, reduced itch, and faster healing of flare sites. At-home devices have made this approach more accessible, though quality and power output vary widely between products.

Evidence: Emerging

Other Supplements and Approaches Worth Knowing About

Building Your Eczema Management Plan

The best approach to eczema combines multiple strategies tailored to your specific situation. Here is a framework to think about it:

When to See a Specialist

You should see a dermatologist or allergist if:

• Your eczema is not responding to over-the-counter treatments after 2-4 weeks
• Flares are becoming more frequent or severe
• You have signs of skin infection (increased redness, warmth, pus, fever, or painful swelling)
• Eczema is significantly affecting your sleep, work, or mental health
• You are using topical steroids frequently and want to explore steroid-sparing alternatives
• You suspect a food allergy or contact allergy is contributing
• You are an adult with new-onset eczema (this sometimes signals an underlying condition that needs evaluation)

Consider seeing a functional medicine practitioner if you want to explore the gut-health connection, identify hidden food sensitivities through a structured elimination protocol, optimize your nutritional status, or take a more root-cause oriented approach alongside your conventional treatment plan.

Living with Eczema: The Mental Health Piece

This often gets overlooked, but it should not. Eczema is not “just a skin condition.” Studies consistently show that people with moderate-to-severe eczema have higher rates of depression, anxiety, and social isolation. The itch disrupts sleep. The visible skin changes affect self-esteem. The chronic nature of the disease wears people down.

If eczema is affecting your mental health, that is a valid and legitimate reason to seek support. Cognitive behavioral therapy (CBT) has shown benefit for itch management and coping. Some patients also benefit from habit-reversal training to break the scratch cycle.

You deserve to be treated as a whole person, not just a collection of symptoms.

Eczema in Children: Special Considerations

Most eczema starts before age five. In infants and young children, a few things are worth highlighting:

• Early and aggressive moisturization in high-risk newborns (those with a family history of atopic disease) may help prevent eczema from developing in the first place. A 2014 study in the Journal of Allergy and Clinical Immunology showed a 50% reduction in eczema incidence with daily emollient use from birth.
• The “atopic march”: Children who develop eczema early are at higher risk for developing food allergies, asthma, and hay fever later. Early and effective eczema control may help interrupt this progression.
• Food allergy testing is more commonly warranted in young children with moderate-to-severe eczema, especially if flares seem connected to feeding.
• Bathing practices matter: The “soak and seal” approach (a 10-minute lukewarm bath followed immediately by emollient application) can be very effective for hydrating and protecting the skin.

Frequently Asked Questions About Eczema

The Bottom Line

Eczema is a complex, chronic condition. But it does not have to run your life.

The treatment options available today are better than they have ever been. From advanced biologics that can clear severe disease to functional medicine strategies that address the gut-skin connection, you have more tools at your disposal than any previous generation of eczema patients.

The most successful approach combines consistent skin barrier care with targeted anti-inflammatory treatments and root-cause strategies like optimizing vitamin D, supporting gut health, managing stress, and identifying personal triggers.

Work with a healthcare team that listens, take a multi-layered approach, and be patient with the process. Skin healing takes time. But improvement is possible, and for many people, clear skin is a realistic goal.

This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting or changing any treatment plan.

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