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How come when we scratch to relieve an itchy spot on our bodies, another itch appears in a different area nearby?

Asked by MRSHINYSHOES (13996points) September 25th, 2011

When you get an itch on your back, and you scratch it to relieve the itch, do you notice how the “relieved itch” is immediately replaced by another itch somewhere else on your back? It not only happens with itches on your back, but elsewhere too, for example, your leg. What causes this phenomenon?

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