It’s something nearly every mammal shares with us, if you notice all the mammals that have similar responses are all pack-oriented. It’s ingrained reactions meant to tell the larger group either “Help me” ie: ‘ow’ ‘tsss’ etc. Or “Run!” ie: ‘AHHH!’ ‘FUHHH’ ‘OOO.’ It’s all dependent on the level of pain, we give an equal level of severity of an alarm. It also for some reason alleviates pain as well.
Source: https://www.jpain.org/article/S1526-5900%2815%2900032-2/abstract
As always, great answers..
The answer is.. we don’t always, but it’s evolution and environment.
Say I dress up like a bear and claw you, isn’t your first response going to be to yell and scream at the bear to scare it away, even if you think it won’t work?
Screaming is a fundamental instinct in humans. As children it means “something is hurting me and I don’t like it, come save me”. Later, its “get away from me you monster” or “someone come help”.
Since it’s so fundamental, EVERYONE screams, until they don’t. That is, environment. Take the example of 2 30 year old men, one has never fallen or been hurt, and one who was beaten regularly as a child. If they both break the same arm, the one with the smaller scope is likely to react instinctively and scream and cry. The one who has experienced a great deal of pain has a larger scope and will be able to experience pain or alarm without responding instinctively and screaming.
This is very evident when you compare men and women. Women have higher pain tolerance, but men are chided for responding to pain instinctively, so most men eventually learn not to scream as a reaction.
In fact.. the effect is so natural that when you scream, your brain actually releases hormones that dial down the pain a little, on top of the distraction of venting. That’s why yelling and cursing helps when in theory it shouldn’t.
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