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Why Does My Eczema Get Worse in the Winter? 

January 7, 2026

TL;DR

Eczema often worsens in winter because cold temperatures, low humidity, and indoor heating dry out the skin and weaken its barrier, making it more prone to irritation, itching, and flares; consistent moisturizing, gentle skincare, and dermatologist-recommended treatments can help manage winter symptoms.

If you’ve noticed that your eczema symptoms flare up during the winter, you’re not alone. Many people with atopic dermatitis experience more itching, redness, and irritation as the seasons change. But why is eczema worse in the winter—and what can you do about it?

In this article, we’ll explore the key environmental and biological triggers behind winter eczema flare-ups and how treatments like narrowband UVB phototherapy can help restore comfort and control.

Common Winter Triggers That Worsen Eczema

  1. Dry, Cooler Air

As temperatures drop, so does humidity. Winter air is typically drier, which causes the skin to lose moisture more quickly. For people with eczema—whose skin barrier is already compromised—this leads to:

  • Dry, cracked skin
  • Increased itching
  • Greater sensitivity to allergens and irritants

Tip: Switch to a heavier moisturizer during winter months and apply it immediately after bathing to lock in hydration.

  1. Indoor Heating

When we turn on the heat indoors, the air becomes even drier. Forced air systems in homes and offices can rapidly dehydrate the skin and worsen eczema symptoms.

Consider using a humidifier in your bedroom or living space to help maintain skin hydration.

  1. More Layers, More Irritants

Winter means bundling up in sweaters, scarves, and jackets—but not all fabrics are skin-friendly. Wool and synthetic materials can irritate sensitive skin and cause flare-ups. Plus, sweat trapped under layers can lead to itching and inflammation.

Stick to soft, breathable cotton when possible, and avoid overdressing indoors.

  1. Stress and Routine Changes

Back-to-school season, holiday planning, and shorter daylight hours can all increase stress levels. Stress is a known eczema trigger, as it can disrupt immune response and impair skin healing.

Practice stress-reducing techniques like deep breathing, meditation, or light exercise to help manage flare-ups.

  1. Less Sunlight

During the summer, mild exposure to sunlight often improves eczema for some people. In the winter, shorter days and fewer opportunities to be outside can reduce this natural UV exposure.

That’s one reason narrowband UVB phototherapy is often recommended during colder months. It mimics the therapeutic wavelength of sunlight to:

  • Reduce inflammation
  • Strengthen the skin barrier
  • Relieve itching
  • Improve overall skin appearance

How Phototherapy Can Help Seasonal Eczema

For moderate to severe eczema, phototherapy is an FDA-cleared treatment that uses narrowband UVB light to reduce symptoms and improve skin health. It’s safe, effective, and backed by decades of research.

At Phothera, we offer both in-office and home phototherapy options, including the Phothera 100 and 100XL, which are designed for easy, guided use at home under provider supervision.

Patients often report fewer flare-ups, less itching, and improved skin texture—especially when used consistently during high-trigger seasons like fall and winter.

Tips for Managing Winter Eczema Flares

  • Use gentle, fragrance-free cleansers and moisturizers
  • Take shorter, lukewarm showers (not hot)
  • Apply moisturizer within 3 minutes of bathing
  • Avoid irritating fabrics and tight clothing
  • Stay hydrated and consider indoor humidity
  • Talk to your dermatologist about phototherapy as a long-term option

When to Talk to a Dermatologist

If your eczema is persistent, painful, or interfering with your daily life, it may be time to explore medical treatment options. Your provider may recommend topical treatments, biologics, or phototherapy depending on your symptoms and lifestyle.

Clearer Skin Is Possible—Even in the Winter

Winter may be filled with triggers, but eczema doesn’t have to control your life. With the right strategies—and support from your provider—you can manage flare-ups and feel more comfortable year-round.

Learn more about how Phothera’s home phototherapy devices can support eczema relief.