"Masking" our emotions: Botulinum toxin, facial expression, and well-being in the age of COVID-19.

Mask-wearing in the wake of COVID-19 brings new challenges to our ability to communicate and perceive emotion through full facial expression, our most effective and universally shared form of communication, and BTX may offer a positive solution to decrease negative emotions and promote well-being for both the mask-wearer and all who come in contact with that individual.