A member asked:

Does breathing into a paper bag really help panic and hyperventilation?

A doctor has provided 1 answer

Yes: If not for the "psychological" benefit, breathing into and out of a closed paper bag will allow carbon dioxide to accumulate in the arterial blood, thus enhancing blood flow to the brain. Theoretically, this could reduce the chance of a fainting spell. Would not recommend doing it for too long though.

Answered 8/4/2015

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