Neural pathway identified linking psychological stress to skin inflammation

Researchers at Fudan University have identified a specific neural pathway that connects psychological stress in the brain directly to skin inflammation. Published in the journal Science, the study utilized mouse models and analysis of patients with atopic dermatitis to map how stress signals travel to the skin.

The mechanism involves specific sympathetic neurons known as Pdyn+, which act as a direct line between the brain and the skin's immune system. When psychological stress occurs, these neurons activate and release signals that attract eosinophils, immune cells that trigger redness, itching, and inflammation. Blocking these neurons prevented stress-induced skin inflammation in experimental settings.

Beyond skin reactions, experts note that chronic stress can lead to systemic health issues, including headaches, digestive problems, muscle tension, and increased risks of heart disease or stroke. Prolonged stress also disrupts sleep quality, creating a cycle that further elevates stress hormone levels.