Damn!!! Did You Know?

[TDDA]

Yes it's like the warrior's scream a bit. Tensing helps too to wane pain away. It's done unconscious and can be used to leverage in a fight or to wane it off quickly. While screaming a lot of tension is already happening.

I myself like to think of it as "bad chi". Just as chi can be collected throughout the body and directed and dumped, pain can be too. Breathing pain away is for me like breathing up chi, just different polarity (?). 

And also, the more you feel it the faster it wanes, maybe screaming helps experiencing it more too and so it's over faster. My sifu taught me to focus on injuries because it makes the body heal faster too instead of just ignoring it.

This is all nonscientific personal opinion though :)

But the little Grasshopper was told, "There is no pain." "There is no pain."

Okay that was supposed to be  a joke.

Screaming and cursing may help with the initial pain, but if it is continued it will be debilitating, and counter productive. Some people use this method as a way to distract from the pain and to project their pain somewhere else. Either way, if effective it is short lived, and likely to you placed at the bottom of the list to get treatment or help, and the first to get kicked out the door.

Yes of course constant screaming won't help, it's to feather the initial impact. I was looking at it from a martial "arts" and self defense viewpoint, where I know it works like that. While for example taking a hit with a deflection block (hurts a lot on the forearms) it helps to tense the fist for a split second after the impact to get over the initial pain and not have the nerves numbing your movement because of the pain.

I had to chuckle about your throw out example because I learned in EMT (mandatory for driver license here) that you look first for those that are not screaming. Because those that still scream are at least conscious and not under shock. The silent ones are the ones you go for first. Those that still can complain are better off than those than can not.