Find a shady spot under a tree, take a breath of fresh air and call me in the morning.

Health care providers have long suggested stressed-out patients spend time outdoors. Now hundreds of providers are going a step further and issuing formal prescriptions to get outside. The tactic is gaining momentum as social media, political strife and wars abroad weigh on the American psyche.

Of course, no one needs a prescription to get outside, but some doctors think that issuing the advice that way helps people take it seriously.

"When I bring it up, it is almost like granting permission to do something they may see as frivolous when things seem so otherwise serious and stressful," said Dr. Suzanne Hackenmiller, a Waterloo, Iowa, gynecologist who started issuing nature prescriptions after discove

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