When we accidentally touch something familiar, like a warm pan, our brains already know what feeling to expect and how much it might hurt. But if you were blindfolded and had no idea you were touching a warm pan, you’d feel more intense pain—even if the pan wasn’t warm enough to harm you. A new study from the Department of Clinical Medicine at Aarhus University shows that not knowing what to expect changes how the brain interprets pain, making it hurt worse even when there’s no real danger.
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