In a study titled “Hyperbaric oxygen therapy for Bell’s Palsy” (http://www.ncbi.nlm.nih.gov/pubmed/22336830?dopt=Abstract), the authors claim that “Very low quality evidence from one trial suggest that hyperbaric oxygen therapy may be an effective treatment for moderate to server Bell’s palsy”.
In the study they reference two groups: One group of 42 people that received hyperbaric oxygen [...]