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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The brain is not good at localizing internal pain. A similar effect to the testicular-pain-in-abdomen effect is that when people have heart attacks they often feel pain in their arm or jaw. This effect is called *referred pain*. Internal pain at a specific location usually cannot be distinguished from other internal pain carried on the same nerve path.
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