A member asked:

Why does my head and face throb when i stand up? brief headache lasting 5sec or less. happens when i barely strain when on the toilet too. tumor?

A doctor has provided 1 answer

No tumor: When standing, especially from lying down the blood flow dynamics to the heart and head and neck region change. The description of a similar effect with mild straining on the toilet is known as the Valsalva maneuver. Return of systemic blood to the heart is impeded by the pressure inside the chest. The output of the heart is reduced and stroke volume falls. This occurs from 5 to about 14 seconds

Answered 6/8/2014

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