Eczema flare-ups, specifically atopic dermatitis, are triggered by a complex interplay between genetic predisposition, a compromised skin barrier, and environmental stimuli. At the molecular level, a deficiency in the protein filaggrin weakens the stratum corneum, allowing allergens and irritants to penetrate the skin and trigger an inflammatory immune response [1]. Common triggers in the Australian environment include seasonal pollens, dust mites, harsh surfactants in soaps, and temperature fluctuations that lead to transepidermal water loss (TEWL) [2].
To soothe a flare-up, the primary objective is to arrest the inflammatory cascade and restore barrier integrity. Evidence-based management involves the application of liberal amounts of occlusive emollient creams containing ceramides, cholesterol, and fatty acids to mimic the natural lipid bilayer [3]. Additionally, short-term use of topical corticosteroids or calcineurin inhibitors may be necessary to downregulate T-cell activation and cytokine production, while avoiding further irritation from fragrances or botanical extracts that could cause contact sensitisation [4].
From a physiological perspective, eczema is characterised by an overactive Type 2 helper T-cell (Th2) immune response. When the skin barrier is breached, keratinocytes release alarmins that activate innate lymphoid cells and dendritic cells, leading to the production of pro-inflammatory cytokines such as IL-4 and IL-13 [1]. These cytokines further suppress the production of antimicrobial peptides and barrier proteins, creating a self-perpetuating cycle of inflammation and infection risk.
The 'itch-scratch cycle' is a significant clinical challenge, as mechanical trauma from scratching further disrupts the physical barrier and promotes the release of pruritogens. Chronic inflammation can eventually lead to lichenification, where the skin becomes thickened and leathery. Modern dermatological science focuses on 'proactive therapy'—using low-dose anti-inflammatory agents even during quiescent periods to prevent the subclinical inflammation that precedes a visible flare [5].
For those navigating a compromised skin barrier, our Surface Calm ceramide cleanser was formulated to provide a non-stripping cleanse that respects the delicate stratum corneum. Many of our customers then pair this with Balance Biome Crème, which includes Bifida Ferment Lysate and Niacinamide to support microbiome resilience and help soothe a sensitised complexion during environmental shifts.
FAQ
Why does my eczema get worse during the Australian winter?
Low humidity and indoor heating significantly increase transepidermal water loss, causing the skin to become brittle and prone to micro-fissures. This environmental stressor impairs the enzymatic processes required for lipid synthesis in the stratum corneum, making the skin more susceptible to irritants [2].
Can diet affect eczema flare-ups?
While food allergies are more common in children with atopic dermatitis, the link between specific foods and adult flares is less clear. However, emerging research into the gut-skin axis suggests that a high-fibre diet supporting a diverse microbiome may help modulate systemic inflammation, potentially reducing the severity of skin symptoms [6].
What ingredients should I look for in a moisturiser for eczema?
Look for a 'physiological lipid' profile including ceramides (specifically Ceramide NP, AP, and EOP), cholesterol, and free fatty acids in a 3:1:1 ratio. Humectants like glycerine and urea are also beneficial for drawing moisture into the skin, while petrolatum remains the gold standard for providing an occlusive seal to prevent water evaporation [3][5].
References:
[1] Langan SM, et al. Atopic dermatitis. The Lancet. 2020;396(10247):345-360. doi:10.1016/S0140-6736(20)31286-1
[2] Nutten S. Atopic Dermatitis: Role of the Skin Barrier, Environmental Factors and Food Allergy. International Archives of Allergy and Immunology. 2015;166(2):85-90. doi:10.1159/000370308
[3] Eichenfield LF, et al. Guidelines of care for the management of atopic dermatitis: section 2. Management and treatment of atopic dermatitis with topical therapies. Journal of the American Academy of Dermatology. 2014;71(1):116-132. doi:10.1016/j.jaad.2014.03.023
[4] Wollenberg A, et al. Consensus-based European guidelines for treatment of atopic eczema (atopic dermatitis) in adults and children: part I. Journal of the European Academy of Dermatology and Venereology. 2018;32(5):657-682. doi:10.1111/jdv.14891
[5] Paller AS, et al. The microbiome in patients with atopic dermatitis. Journal of Allergy and Clinical Immunology. 2019;143(1):26-35. doi:10.1016/j.jaci.2018.11.015
[6] Salem I, et al. The Gut Microbiome as a Major Regulator of the Gut-Skin Axis. Frontiers in Microbiology. 2018;9:1459. doi:10.3389/fmicb.2018.01459
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new skincare regimen. Content reviewed by a biomedical scientist.
