Key Mechanisms
Neurovascular dysregulation
Blood vessels in the face react too strongly to heat, stress, and stimulation, leading to flushing and persistent redness.
Immune system sensitivity
An overactive inflammatory response can keep skin in a low-grade flare state.
Microbiome and Demodex
Higher Demodex density and microbiome shifts may trigger inflammation in some people.
Genetic predisposition
Rosacea tends to run in families, suggesting inherited susceptibility.
Triggers vs Causes
Triggers are the things that spark symptoms. Causes are the underlying drivers.
Triggers
- • Heat, sun, and weather shifts
- • Alcohol, spicy foods, hot drinks
- • Stress and intense exercise
Causes
- • Vascular and immune changes
- • Barrier disruption and sensitivity
- • Genetics and microbiome factors
Learn how to identify triggers in the triggers & tracking guide.
Why this matters
Understanding the mechanisms helps you choose treatments that match your symptoms and avoid unnecessary irritation.