Is there an association between atopic dermatitis (eczema) and rheumatoid arthritis?

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Last updated: May 6, 2026 • View editorial policy

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Is There a Relationship Between Eczema and RA?

Yes, there is a clear unidirectional relationship: patients with atopic dermatitis (eczema) have a significantly increased risk of developing rheumatoid arthritis, but patients with RA do not have increased risk of developing eczema.

The Evidence for Association

The 2022 American Academy of Dermatology guidelines on AD comorbidities explicitly recognize associations between AD and autoimmune conditions, including immune-mediated diseases 1. While these guidelines focus primarily on atopic comorbidities (asthma, allergic rhinitis), they acknowledge emerging evidence linking AD to autoimmune conditions.

The most definitive evidence comes from a 2023 systematic review and meta-analysis that specifically examined this relationship 2. This study found:

  • Patients with AD have significantly increased odds of developing RA (the association goes in this direction)
  • Patients with RA do NOT have increased odds of developing AD (no reverse association)
  • This unidirectional relationship held consistent across multiple study designs

Quantifying the Risk

Multiple high-quality studies confirm the magnitude of risk:

  • A 2023 Mendelian randomization study (which uses genetic data to establish causality) found genetically predicted AD linked to 28-65% higher risk of RA depending on the analysis method 3. This causal relationship remained significant even after controlling for other atopic conditions (asthma, allergic rhinitis) and confounding factors (smoking, drinking, obesity).

  • A 2021 Swedish population-based case-control study of over 100,000 AD cases found AD was significantly associated with autoimmune diseases (adjusted OR 1.97), with particularly strong associations for rheumatological conditions 4.

  • A 2021 systematic review and meta-analysis found AD patients had 30% higher risk of incident RA (pooled OR 1.30), with cohort studies showing even stronger associations (OR 1.37) 5.

Clinical Implications

For Patients with Atopic Dermatitis:

  • Be aware that AD represents a risk factor for future RA development
  • Monitor for joint symptoms (morning stiffness, symmetric joint swelling, particularly in small joints of hands and feet)
  • The risk appears independent of other atopic conditions and traditional RA risk factors

For Patients with Rheumatoid Arthritis:

  • There is no increased risk of developing AD
  • If skin symptoms develop, consider other causes before attributing them to an AD-RA association

Important Caveats

The mechanism underlying this unidirectional relationship remains unclear. The 2023 Mendelian randomization study provides evidence for a causal effect of AD on RA risk rather than just correlation 3, but the biological pathways require further investigation.

The association is modest but clinically meaningful. While the relative risk increase is 28-37%, the absolute risk remains low given RA's baseline prevalence. This should inform counseling but not cause undue alarm.

Severity matters. The Swedish study found that having multiple autoimmune diseases resulted in stronger associations with AD than having only one 4, suggesting more severe immune dysregulation may drive these relationships.

References

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.