Stress and eczema: the biological link doctors missed until now

A study identifies the neural circuit that turns chronic stress into inflamed skin. It's not the pathway scientists expected.

 

Scientists just mapped the 'highway' from stress to eczema flare-ups For the roughly 16.5 million American adults living with eczema, the connection between stress and flare-ups feels obvious. A National Eczema Society survey found stress ranked as the single biggest trigger. But until now, no one has been able to explain how it happens. A new study published has changed that. Researchers at Fudan University identified a group of neurons that, under chronic stress, release a chemical signal called CCL11 directly into the skin. That signal attracts eosinophils — immune cells that drive inflammation — quadrupling their numbers in affected tissue. What wasn't driving this response was the biggest surprise. The stress system that dermatologists have long blamed for causing flares turned out not to be the culprit. Blocking it actually made inflammation worse, suggesting it may be protective. "Your eczema is not just skin-deep — your nervous system and immune system are working together," said dermatologist Tanya Evans, MD. This "eosinophil paradox" may also explain why some immune-targeting eczema treatments have shown inconsistent results. The findings come from mouse models and need validation in humans, but the implications stretch beyond eczema. The same pathway may operate in psoriasis, rosacea, and chronic urticaria, potentially opening the door to treatments that target the neural signal itself rather than broadly suppressing the immune system. For the full story, including practical management strategies aligned with this research, jump to "Eczema flare-ups: Stress is a direct cause, study confirms." Also making headlines this week: 🧬 Alzheimer's gene carriers showed less cognitive decline when they ate more meat 🏃 7 a.m. exercise may be the sweet spot for lower cardiometabolic risk 💉 Shingles vaccine may also reduce your risk of major cardiovascular events We love to hear from you, so please email us if you have any feedback, comments, or questions about this weekend's Sunday Supplement. Stay informed and stay healthy! Tim Snaith Newsletter Editor, Medical News Today

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