Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 46 4 2008 08 15 333 336 A. R Karimi-Yazdi Department of Otolaryngology, Head and Neck Surgery, Imam Khomeini Hospital Complex, School of Medic A Vasheghani-Farahani Department of Otolaryngology, Head and Neck Surgery, Imam Khomeini Hospital Complex, School of Medic M Sadeghi Department of Otolaryngology, Head and Neck Surgery, Imam Khomeini Hospital Complex, School of Medic S. M Sadr-Hoseini Department of Otolaryngology, Head and Neck Surgery, Imam Khomeini Hospital Complex, School of Medic A. A Sazgar Department of Otolaryngology, Head and Neck Surgery, Imam Khomeini Hospital Complex, School of Medic M. A Harirchian Department of Neurology, Imam Khomeini Hospital Complex, School of Medicine, Tehran University of Me N. S Alirezaie Otolaryngology Research Center, Head and Neck Surgery, Hazrat Rasoul Akram Hospital Complex, Iran Un 2015 09 28 During last decades many researchers have focused on the conditions associated with Bell's palsy including diabetes mellitus, hypertension, and viral infections. This study was performed to evaluate correlation of diabetes mellitus and Bell's palsy and some relevant features not discussed in the literature in an Iranian population. The presence of diabetes mellitus was evaluated in a total number of 275 subjects (75 patients with Bell's palsy and 200 control subjects). Diabetes mellitus was noted in 10 (13.3%) patients with Bell's palsy among which 6 case were diagnosed as new cases of diabetes. Previous history of Bell's palsy was present in 10.67% of the subjects with Bell's palsy. Symptoms of other cranial nerves revealed higher figures in Bell's palsy patients with underlying diabetes. Such studies in developing countries may reveal some unknown features of the disease. This study confirms the correlation of diabetes mellitus and Bell's palsy for the first time in an Iranian population. The results also suggest that diabetic patients with Bell's palsy suffer from more cranial nerve symptoms. We offer screening tests of diabetes as a routine process in the management of Bell's palsy especially in developing countries. https://acta.tums.ac.ir/index.php/acta/article/view/3493 https://acta.tums.ac.ir/index.php/acta/article/download/3493/3470