The Association between Allergic Diseases and Migraine: A Systematic Review and Meta-Analysis.

INTRODUCTION

This study aimed to systematically review and summarize epidemiological evidence on the relationship between allergic diseases and migraine outcomes.

METHODS

This meta-analysis, which was registered with PROSPERO (CRD420250656492), employed data from PubMed, Embase, the Cochrane Library, and references from the studies included in the review. The search encompassed literature from the inception of these databases through February 24, 2025. We included observational studies investigating the association between allergic diseases and migraine. The risk of bias was assessed using the Newcastle-Ottawa Quality Assessment Scale (NOS). Pooled odds ratio (OR) with 95% confidence interval (CI) was calculated using a random-effects model.

RESULTS

A total of 10 studies encompassing 14,952,953 participants were included. The overall risk for migraine in patients with allergic diseases was 1.52 (95% CI: 1.40-1.65). Specifically, the meta-analysis revealed an OR for atopic dermatitis of 1.27 (1.17-1.38), 1.49 (95% CI 1.32-1.68) for asthma, 2.16 (95% CI 1.43-3.24) for allergic rhinitis, and 1.74 (95% CI 1.43-2.10) for allergic conjunctivitis.

CONCLUSION

The current meta-analysis suggests that allergic diseases are associated with an increased risk of developing migraines. However, further large-scale prospective cohort studies are required to validate the proposed association, considering the considerable heterogeneity observed in our analyses.