PNS problem?: Sleep increases parasympathetic nervous system (pns) activity. Pns also can relax blood vessels and hence increase blood flow to your brain. When you are awakened this could manifest as a headache.
Answered 2/11/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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