Rosacea and seborrheic dermatitis: a retrospective cohort study.

Rosacea and seborrheic dermatitis are both chronic inflammatory skin conditions with facial distributions. Using the TriNetX database, we investigated the concomitance of rosacea and seborrheic dermatitis. After propensity score matching, rosacea patients had an increased risk of seborrheic dermatitis (odds ratio 6.456; 95% confidence interval, 6.155-6.772; P < 0.0001). This significant correlation emphasizes the importance of clinicians remaining observant for signs of both conditions when diagnosing and managing patients with either disease.