Bell's palsy research hotspots and frontiers from 2002 to 2021: a bibliometric and visual analysis

Bell's palsy is an idiopathic, acute, unilateral peripheral facial nerve paralysis, where incomplete or failed recovery causes substantial social and psychological stress to the patient, seriously influencing their quality of life and social activities. We conducted a bibliometric investigation of the knowledge structure and frontier hotspots in Bell's palsy research. Bell's palsy publications between 2002 and 2021 were retrieved from Web of Science. CiteSpace, VOSviewer, and an online bibliometric platform were used for visual, burst, citation, and co-occurrence analyses, respectively. A total of 1,378 publications were included. The annual Bell's palsy publication output followed an upward trend from 2002 to 2021. The USA and Harvard University published the most Bell's palsy research articles. Yeo SG and Otology & Neurotology were the most prolific author and journal, respectively, on Bell's palsy. The results suggested that Bell's palsy research hotspots focused on rehabilitating facial nerve function and improving prognosis, and combining specific therapies (acupuncture) would be of future interest. The cited references timeline revealed that Bell's palsy following COVID-19 vaccination was an emerging research hotspot. The bibliometric analysis demonstrated that the USA dominates Bell's palsy research and that rehabilitating facial nerve function and prognosis were research hotspots. Emerging mechanistic studies mainly focused on Bell's palsy following COVID-19 vaccination. Our findings could be a reliable source for global scholars to rapidly identify research hotspots and potential research directions and frontiers.