Exploring the Link Between Atopic Dermatitis and Rosacea: An In-Depth Review of Comorbidities and Underlying Mechanisms

By
Yuewei Zeng
Yanyan Feng
June 5, 2026

Frontiers In Immunology

Overview

This review examines the emerging evidence of shared mechanisms and comorbidities between atopic dermatitis (AD) and rosacea. It highlights the potential for overlapping pathophysiological processes and the implications for therapeutic strategies.

Background

Atopic dermatitis and rosacea are prevalent inflammatory skin disorders that significantly impact patients' quality of life. Traditionally viewed as distinct conditions, recent findings suggest they may share common immunological pathways, which could influence treatment approaches. Understanding these connections is crucial for optimizing management strategies for affected patients.

Data Highlights

No numerical data or trial results were presented in the source material.

Key Findings

Both AD and rosacea share an upstream innate immune activation platform involving TLR2/TLR4 signaling and mast cell degranulation.
AD is characterized by Th2/ILC2 skewing, while rosacea shows Th1/Th17 involvement with LL-37 overproduction.
Dupilumab-induced rosacea-like dermatitis suggests competition between the immune polarization states of AD and rosacea.
Future research should utilize multi-omics approaches to clarify causal pathways between these conditions.
Shared therapeutic strategies may need to be reconsidered in light of the mechanistic overlaps identified.

Clinical Implications

Clinicians should be aware of the potential for overlapping mechanisms in patients with both AD and rosacea, which may necessitate tailored treatment approaches. Understanding these connections can aid in the management of comorbid conditions and improve patient outcomes.

Conclusion

The review underscores the complexity of the relationship between atopic dermatitis and rosacea, suggesting that further research is needed to elucidate their shared mechanisms and inform clinical practice.