Background
Bell's palsy is an idiopathic facial palsy with an unknown cause, and 75% of patients heal spontaneously. However, the other 25% of patients continue experiencing mild or severe disabilities, resulting in a reduced quality of life. Currently, various treatment
Conclusion
Uncultured umbilical cord-derived mesenchymal stem cell transplantation may be a potential treatment for patients with Bell's palsy who do not spontaneously recover.