How stress stops hair growth (in mice) – Livescience.com

When faced with incredible stress, people sometimes shed hair by the handful, but scientists don’t know exactly why that is. Now, a new study in mice offers a clue: Stress hormones may put hair growth on pause.   
Follicles, the specialized organs that sprout hairs, cycle through “growth” and “rest” stages, where the follicle first actively produces new hair and then falls dormant. In mice
, chronically high levels of the stress
hormone corticosterone similar to the human hormone cortisol keep…

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