Tickling can sometimes hurt because it stimulates nerve fibers that are also associated with pain.
Here's a breakdown:
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Stimulation of Pain Receptors: According to Dr. Alan Hirsch, a neurologist and psychiatrist, tickling can activate unmyelinated nerve fibers that are also responsible for transmitting pain signals.
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Overlapping Sensations: The sensation of tickling is complex and likely involves a combination of touch, pressure, and possibly even a mild form of irritation. This combination can sometimes cross the line into discomfort or even pain, depending on the intensity and the individual's sensitivity.
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Individual Variation: Everyone has a different pain threshold and sensitivity to touch. What feels like a pleasant tickle to one person might be uncomfortable or painful to another.
Therefore, while tickling is generally considered a playful and pleasurable sensation, the underlying mechanisms can sometimes trigger pain responses, leading to discomfort.
