A Trick for Making Vaccinations Less Painful

Smiling or grimacing reduces needle pain by Steffie Drucker

• Smiling sincerely or grimacing can significantly reduce the pain of needle injection. (2020, December). Smiling sincerely or grimacing can significantly reduce the pain of needle injection. UCI News. https://news.uci.edu/2020/12/01/smiling-sincerely-or-grimacing-can-significantly-reduce-the-pain-of-needle-injection/ 
• Pressman, S. D., Acevedo, A. M., Hammond, K. V., & Kraft-Feil, T. L. (2020). Smile (or grimace) through the pain? The effects of experimentally manipulated facial expressions on needle-injection responses. Emotion. Advance online publication. https://doi.org/10.1037/emo0000913 
• Episode on the facial feedback hypothesis: https://www.curiositydaily.com/can-smiling-actually-make-you-happier-and-why-a-clockmaker-figured-out-longitude/