The Science Behind Why You Say ‘Ow’ When You’re In Pain

http://www.huffingtonpost.com/2015/02/03/why-you-say-ouch-pain_n_6594170.html

New research from the National University of Singapore suggests that vocalizing may interfere with pain signals traveling to the brain, distracting you from the uncomfortable sensations you’re feeling…

Under comments:

Jeanne Karaffa said:  Swearing helps too

https://painkills2.wordpress.com/2014/11/20/11-suggestions-for-managing-pain/

11 Suggestions for Managing Pain

9. Grunt. Sometimes, when we’re doing something that takes extra effort, we make a noise (or grunt). A little verbal exhalation, to express the pain within the physical effort. It’s a type of release that you will be able to hear in your subconscious — just a little acknowledgement (like a note to yourself) that you’re still fighting the pain. You are making the effort, and that’s a good thing.