A member asked:

Why do i get headaches when i get woken up?

A doctor has provided 1 answer
Dr. Michael Rothman answered

Specializes in Internal Medicine

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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