How come, when I get hit in the balls, the pain feels like it’s in the intestine or stomach? The sensation resembles having a stomachache or something like that. I’m guessing it has to do with the neurons in the lower abdominal area and/or where they map to in the brain.
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In a particularly odd bit of human development, the testes originally develop in the abdomen and descend slowly, getting wrapped in layers of abdominal wall as they go. They share a nerve supply, which like most internal pain is dull and vague rather than sharp and localized. As a result, the brain only knows that internal testicular pain is coming from somewhere in the abdomen/related area. It’s an example of referred pain, where the pain doesn’t line up with the actual location.
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