When an eczema flare hits, the goal is to calm inflammation quickly, protect the skin barrier, and avoid the triggers that keep the cycle going. Most flares respond well to a combination of consistent moisturizing, targeted medication, and environmental adjustments. Here’s how to manage each part.
Know Your Triggers
Eczema flares are driven by a mix of environmental, biological, and emotional factors, and they vary from person to person. The most common culprits include dust mites, pollen, mold, pet dander, cold dry air, and rough fabrics like wool. Chemical irritants matter too: fragrances, dyes, and even air pollutants like soot, sulfur dioxide, and nitrogen dioxide have been linked to higher rates of eczema in population-level studies.
Stress is a well-documented trigger. It ramps up the body’s inflammatory response, which can push simmering eczema into a full flare. Respiratory viruses, including the flu, can do the same. And people with eczema have a measurably different skin microbiome, with fewer of the bacteria that support healthy skin, which makes the barrier more vulnerable to irritants in the first place.
Keeping a simple log of what preceded your last few flares (new laundry detergent, a stressful week, a weather shift) helps you spot patterns faster than guessing.
Moisturize Aggressively
During a flare, moisturizer isn’t optional. Apply a thick, fragrance-free cream or ointment at least twice a day and immediately after bathing while your skin is still slightly damp. Ointments (like petroleum jelly) seal in more moisture than lotions, which often contain alcohol and can sting irritated skin. The goal is to physically rebuild the skin barrier that eczema disrupts.
Bathing itself can help or hurt depending on how you do it. Lukewarm water for 10 to 15 minutes is ideal. Hot water strips natural oils and makes itching worse. Pat dry gently, leave skin a little damp, and apply moisturizer within a few minutes.
Using Topical Steroids During a Flare
Topical corticosteroids are the first-line treatment for active flares. They’re grouped into seven potency classes, from super-high (class I) down to low (classes VI and VII). Over-the-counter hydrocortisone (1% or 2.5%) falls in the lowest class and works for mild flares on most body areas. Anything stronger requires a prescription.
The general approach is to apply the steroid once or twice a day. Super-high-potency steroids are typically used for up to three weeks, while medium-potency options can be used for up to 12 weeks. Low-potency steroids have no strict time limit. For sensitive areas like the face, groin, and skin folds, treatment is usually limited to one or two weeks, and lower-potency formulations are preferred because the skin there is thinner and absorbs more of the medication.
The key mistake people make is using too little. A fingertip unit (the amount that covers from the tip to the first crease of your index finger) covers roughly an area the size of two adult palms. Apply enough to cover the inflamed skin in a thin, even layer.
Non-Steroid Prescription Options
If you want to avoid steroids or need something for long-term use on sensitive skin, two newer categories of topical medication are available. One type works by blocking a specific enzyme involved in inflammation at the skin’s surface. The other blocks a different inflammatory pathway inside skin cells. Both have shown significantly higher rates of skin clearing compared to placebo in clinical trials, and one formulation (a 1.5% cream applied once daily) actually showed a lower risk of side effects than placebo in a large meta-analysis.
These options are especially useful for the face and other areas where prolonged steroid use carries risks like skin thinning.
Bleach Baths for Stubborn Flares
Dilute bleach baths reduce the bacterial load on the skin, particularly Staphylococcus aureus, which colonizes eczema-prone skin at much higher rates and can worsen flares. The Mayo Clinic recommends adding 1/4 cup of regular household bleach to a 20-gallon bathtub of warm water (or 1/2 cup for a full tub). This creates a concentration similar to a swimming pool.
Soak from the neck down for 5 to 10 minutes. Rinse off, pat dry, and moisturize immediately. Bleach baths aren’t a daily necessity for everyone, but during a persistent flare they can help break the cycle of bacterial overgrowth and inflammation.
Wet Wrap Therapy for Severe Flares
When a flare is intense and not responding to standard treatment, wet wrap therapy can dramatically speed up recovery. The process involves soaking in lukewarm water for about 15 minutes, patting skin mostly dry, applying prescribed topical medication, then layering on a generous amount of fragrance-free moisturizer. Next, you cover the treated skin with damp clothing or wet gauze, then add a dry layer on top to retain warmth.
The wrap stays on for about two hours, or overnight in severe cases. The moisture increases absorption of the medication and physically prevents scratching. This technique is used frequently for children but works for adults too. It can be repeated up to three times a day during the worst of a flare.
Managing Nighttime Itch
Eczema itching tends to intensify at night, partly because the body’s natural anti-inflammatory hormones dip in the evening. This creates a frustrating cycle: poor sleep weakens your immune regulation, which makes the next day’s flare worse.
Several practical adjustments help. Bathe and moisturize right before bed so your skin is well-protected. Keep your bedroom cool, ideally between 60°F and 69°F, since heat intensifies itching. Wear soft cotton clothing to bed. A cool, damp compress applied directly to itchy patches can provide fast temporary relief. Running a humidifier adds moisture to the air and reduces the drying effect that worsens overnight itch.
Over-the-counter antihistamines that cause drowsiness can serve double duty, reducing itch while helping you fall asleep. Melatonin supplements have also been used to improve sleep quality during flares. Limiting screen time before bed and managing stress through meditation or breathing exercises can lower the baseline inflammation that feeds nighttime itching.
Food Allergies and Eczema Flares
The connection between food and eczema is frequently overstated. In children with moderate-to-severe eczema, roughly one-third have a confirmed food allergy (most commonly cow’s milk, egg, and peanut), but the picture changes significantly in adults. In one study of 179 adults who believed wheat triggered their eczema, only 4% actually reacted during a controlled food challenge. For milk, the figure was just 1%.
Even more telling: children whose only symptom was worsening eczema (without hives, vomiting, or breathing issues) reacted to placebo foods just as often as to the suspected allergen. An eczema flare alone, without other allergic symptoms like digestive upset or respiratory problems, is rarely caused by a food allergy. Eliminating entire food groups without proper allergy testing risks nutritional deficiencies without any benefit to your skin.
Recognizing an Infected Flare
Broken, scratched eczema skin is vulnerable to bacterial infection, and an infected flare requires different treatment than a standard one. Watch for yellow crusting on or around the eczema patch, blisters, bumps or sores that ooze, unusual pain or burning (beyond normal itch), increased swelling, or discoloration that looks different from your typical flare. Fever, chills, or nausea alongside worsening skin are stronger warning signs.
An infected flare won’t improve with moisturizer and steroids alone. Steroids can actually worsen an infection by suppressing the local immune response. If you see signs of infection, you need antibacterial treatment, either topical or oral depending on severity.