What Triggers Eczema Flare-Ups? Common Causes You Should Know

July 24, 2025

What Triggers Eczema Flare-Ups? Common Causes You Should Know

Eczema, or atopic dermatitis, is a long-term skin condition that affects people of all ages. It causes dry, itchy, and inflamed skin that can flare up unexpectedly, often without a clear cause.

What makes eczema so tricky is that flare-ups are highly personal, what affects one person might not bother another. However, identifying your triggers can greatly help reduce symptoms and enhance your daily comfort.

In this blog, we’ll take a closer look at the common eczema triggers and offer helpful tips on how to manage and mitigate their impact.

What is an Eczema Flare-Up?

Eczema flare-ups refer to periods when symptoms suddenly worsen, causing irritation, discomfort, and inflammation, typically following a period of relief. The signs of a flare-up include redness, intense itching, dryness, and swelling of the affected areas. These flare-ups often disrupt daily life, making tasks like sleeping, working, or even going out feel challenging.

Knowing what triggers eczema flare-ups can empower individuals to manage their condition more effectively and reduce the frequency and severity of these episodes.

Common Triggers of Eczema Flare-Ups

Several factors can trigger or exacerbate eczema flare-ups. Here are the most common culprits:

A. Environmental Factors

Our surroundings play a major role in eczema flare-ups.

  • Weather changes: Sudden shifts in temperature or humidity (like going from a heated room to cold outdoor air) can dry out the skin and trigger inflammation.
  • Airborne allergens: Pollen, mould spores, and dust mites are some of the most common eczema triggers hiding in plain sight.
  • Pollutants and smoke: Air pollution and cigarette smoke can irritate the skin and worsen existing flare-ups.

B. Allergens

Some people with eczema have sensitivities to specific allergens.

  • Pet dander: Proteins in animal saliva, urine, and skin flakes can provoke flare-ups.
  • Food triggers for eczema: Common culprits include dairy, eggs, soy, wheat, and nuts. Although not everyone with eczema has food allergies, some may experience worsening symptoms after consuming specific foods.
  • Contact allergens: Everyday items like nickel jewelry, scented cleaning products, and some cosmetics can inflame sensitive skin.

C. Irritants

Unlike allergens, irritants cause flare-ups through direct contact and not an immune response.

  • Harsh soaps and detergents: These strip away natural oils, leaving skin dry and more prone to flare-ups.
  • Clothing materials: Wool and certain synthetic fabrics can cause chafing and irritation.
  • Alcohol-based products: Many lotions and perfumes contain drying agents that are especially harmful to eczema-prone skin.

D. Stress and Emotional Triggers

Your skin and mind are more connected than you might think.

  • Emotional stress: Anxiety, sadness, or even excitement can lead to skin flare-ups through hormone-driven inflammation.
  • Hormonal changes: Stress can disrupt hormone levels, potentially increasing skin sensitivity and triggering eczema symptoms.

E. Infections

Skin that’s already compromised is more vulnerable to infections.

  • Bacterial infections: Staphylococcus aureus, a bacteria commonly found on the skin, can rapidly worsen eczema and make it harder to treat.
  • Fungal or viral infections: Athlete’s foot or cold sores can spread to eczematous skin and prolong flare-ups.

F. Hormonal Changes

Hormonal fluctuations can be a sneaky trigger.

  • Puberty, pregnancy, or menstrual cycles: Shifts in estrogen and progesterone levels may lead to skin inflammation and increased itching.
  • Hormonal triggers can be hard to manage, but understanding this pattern can help guide treatment.

G. Sweating and Physical Activity

Exercise is essential for health, but not always easy for eczema-prone skin.

  • Sweat: Salt in perspiration can dry out skin and cause stinging.
  • Friction: Movement during workouts can cause rubbing and irritation, especially in areas where clothing fits snugly.

Tips for Avoiding Eczema Flare-Ups

Now that we’ve explored some common eczema triggers, here are some tips for managing the condition and reducing flare-ups:

  • Gentle Skincare Routines
    Stick to a gentle skincare routine using hypoallergenic and fragrance-free products to avoid irritating the skin. Always moisturize after showering to lock in hydration.
  • Choosing Fragrance-Free and Hypoallergenic Products
    Opt for skincare and laundry products that are fragrance-free and designed for sensitive skin. Look for hypoallergenic items to minimize the risk of irritation.
  • Stress Management Techniques
    Incorporating stress-reduction practices such as meditation, deep breathing exercises, or therapy can significantly help manage eczema flare-ups triggered by emotional distress.
  • Diet Modifications and Allergy Testing
    If food triggers are suspected, consult with a doctor about allergy testing to identify potential culprits. An elimination diet may also be beneficial for managing eczema through dietary adjustments.

Manage Your Eczema Naturally and Effectively 

Identifying what triggers your eczema is essential for managing flare-ups and finding long-term relief. Whether it’s allergens, irritants, or stress, understanding your triggers can help you take back control of your skin.

At Illinois Dermatology Institute, our experts offer personalized care to help you identify the underlying causes of your eczema and build a treatment plan that works. Take the first step toward healthier, more radiant skin.

Schedule your consultation with us today!

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