In response to the above enquiry
The traditional Chinese medical practice to revive facial paralysis is facial massage and “external stimulation.”
The term “external stimulation” refers to traditional “tui na” treatment or “push and pull” treatment, and one of the “reviving techniques” is “pai da” or “slapping and beating”.
To revive and regenerate nerves damaged in oral surgery, slap the face.
Slapping oneself stimulates circulation, activates blood flow, relaxes tight muscles, releases pent up negative emotions, and revives numb nerves.
It is a use of self flagellation in physical therapy.
Placing a hot towel over the face will also help reactivate the nerves.