Why is it so hard to stop? Face-touching rewards us by relieving momentary discomforts like itches and muscle tension. These discomforts usually pass within a minute, but face-touching provides immediate relief that eventually makes it a habitual response that resists change.
https://www.businessinsider.com/4-ways-to-stop-touching-face-minimize-spread-of-coronavirus-2020-3
The Great Health Blog 
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