Eczema, also known as atopic dermatitis, is a chronic inflammatory skin condition that affects millions of people worldwide. Characterized by dryness, redness, itching, and irritation, eczema can significantly impact daily comfort and quality of life. While genetics and immune system responses play a role in its development, external and internal triggers often determine how severe or frequent flare-ups become. Understanding what causes these flare-ups is key to managing symptoms and achieving long-term relief.
Our surroundings can directly influence the health of our skin, especially for those prone to eczema. Sudden temperature changes, pollution, and low humidity levels can cause the skin barrier to lose moisture, making it more susceptible to irritation.
Both cold, dry air and hot, humid weather can worsen eczema symptoms.
Winter: Cold air and indoor heating strip away natural oils, leading to dry, flaky skin.
Summer: Sweat and heat can trigger itching, while swimming pool chlorine can further dry out the skin.
Tip: Maintain indoor humidity using a humidifier, and apply a thick moisturizer right after bathing to lock in moisture.
Exposure to air pollutants, tobacco smoke, and vehicle exhaust can inflame the skin and increase sensitivity. These irritants compromise the skin barrier and may trigger flare-ups, especially in urban environments.
Tip: Wash your face and exposed skin after spending time outdoors, and use gentle, fragrance-free cleansers to remove pollutants.
Many everyday products contain chemicals and fragrances that can irritate sensitive skin. Identifying and avoiding these irritants can significantly reduce eczema flare-ups.
Harsh soaps, bubble baths, and laundry detergents often contain sulfates, alcohol, or synthetic fragrances that dry out the skin. Even residue from detergents on clothing can cause itching.
Tip: Choose fragrance-free, hypoallergenic detergents and mild, soap-free cleansers labeled for sensitive skin.
Rough or synthetic fabrics like wool, polyester, and nylon can cause friction and trap heat, leading to irritation.
Tip: Opt for soft, breathable cotton fabrics and wash new clothes before wearing to remove potential chemical residues.
Some lotions, perfumes, and cosmetics include alcohol, parabens, or artificial scents that can aggravate eczema-prone skin.
Tip: Always patch-test new products on a small area before applying them to larger regions.
For some people, certain foods can cause eczema flare-ups, particularly in children. While food allergies aren’t the primary cause of eczema, they can make symptoms worse.
Common food triggers include:
Dairy products (milk, cheese, yogurt)
Eggs
Nuts (especially peanuts)
Soy
Wheat and gluten-containing foods
Seafood (shellfish, fish)
Tip: If you suspect food triggers, consult a dermatologist or allergist for allergy testing before removing major food groups. They can help identify specific sensitivities through elimination diets or blood tests.
Stress doesn’t directly cause eczema, but it can worsen existing symptoms. When you’re stressed, your body releases cortisol, a hormone that can increase inflammation and weaken the skin barrier.
Stress-related flare-ups often appear during periods of emotional tension, fatigue, or lack of sleep.
Tip:
Practice stress management techniques such as deep breathing, yoga, meditation, or regular exercise.
Maintain a consistent sleep schedule to support skin repair.
Seek professional support if chronic anxiety or depression contributes to skin flare-ups.
People with eczema often have overactive immune systems that react strongly to allergens. These allergic reactions can lead to inflammation and itching.
Common allergens include:
Dust mites
Pet dander
Pollen
Mold spores
Tip:
Use HEPA air purifiers to reduce indoor allergens.
Wash bedding in hot water weekly to kill dust mites.
Keep pets out of the bedroom and vacuum regularly with allergen-friendly filters.
If allergies play a significant role in your eczema, your dermatologist may recommend antihistamines or allergy immunotherapy.
Hormonal fluctuations can also influence eczema severity, especially in women. Many experience flare-ups during pregnancy, menstruation, or menopause, when estrogen levels fluctuate and affect skin hydration and sensitivity.
Tip:
Maintain a balanced diet rich in omega-3 fatty acids, vitamin E, and antioxidants to support hormonal balance and skin health.
Stay consistent with moisturizers during hormonal changes to reduce dryness and irritation.
The skin’s microbiome—a delicate balance of good and bad bacteria—plays an important role in eczema. When this balance is disrupted, bacterial infections (like Staphylococcus aureus) can worsen eczema symptoms.
Signs of infection include yellow crusts, swelling, or oozing.
Tip:
Avoid scratching to prevent open wounds.
Keep skin clean and moisturized.
Seek medical attention if you suspect an infection; your doctor may prescribe topical or oral antibiotics.
Once you understand your personal triggers, you can take proactive steps to manage and minimize flare-ups. Here’s how:
Keep a Symptom Diary: Track what you eat, wear, and do daily to identify potential triggers.
Moisturize Consistently: Use thick creams or ointments multiple times a day—especially after bathing.
Take Short, Lukewarm Showers: Avoid hot water, which can strip skin oils.
Use Gentle Cleansers: Avoid products with alcohol, sulfates, or synthetic fragrances.
Apply Medicated Creams: Use prescribed topical corticosteroids or calcineurin inhibitors for inflammation control.
Stay Hydrated: Drink plenty of water to support skin barrier function.
Dress Smart: Wear light, breathable fabrics and avoid overheating.
If over-the-counter treatments and trigger management don’t control your eczema, it’s time to consult a board-certified dermatologist. They can recommend stronger treatments, such as:
Topical or oral medications (like corticosteroids or immunosuppressants)
Phototherapy (light therapy)
Biologic drugs (such as dupilumab) for moderate-to-severe eczema
Early professional intervention prevents complications, such as skin infections and scarring, and helps develop a personalized care plan tailored to your triggers.
Eczema management starts with understanding your unique triggers and making small, consistent changes to your lifestyle and environment. By identifying what causes flare-ups—whether it’s stress, allergens, food, or harsh products—you can take proactive control of your condition and reduce the frequency and intensity of symptoms.