Bell's palsy is characterized by acute, unilateral onset that compromises function and esthetics, exerting a considerable impact on the social, professional, and psychological aspects of the lives of affected individuals. Without treatment, 30% of patients with complete paralysis will not completely recover. Therefore, shortening the recovery time will accelerate the recovery process leading to better results. The aim of this study was to evaluate the effectiveness of photobiomodulation therapy (PBMT) in the patients undergoing Bell's palsy