Question

What is a vasovagal response to poop?

Answer 1

A vasovagal response to poop is also known as "defecation syncope".

During a vasovagal response to poop or "defection syncope" the straining to poop stimulates your vagus nerve and causes a sudden drop in your heart rate as well as blood pressure.

As a result of the sudden drop in blood pressure and heart rate during the vasovagal response to poop or "defecation syncope" it reduces blood flow to your brain, which can cause dizziness, lightheadedness, cold/clammy skin, fainting and sweating.

Vasovagal response to poop or "defecation syncope" is often triggered by the Valsalva maneuver, where an increase in abdominal pressure reduces the blood that is returning to your heart.

The reason vasovagal response to poop or "defecation syncope" occurs is due to straining and bearing down, which is the "Valsalva maneuver" which increases the pressure in your chest and abdomen.

Other causes of vasovagal response to poop or "defecation syncope" are nerve stimulation in which the body responds by slowing your heart rate and widening blood vessels, which causes the blood to pool in your legs and lower your blood pressure rapidly.

And the brain response, when the blood flow to your brain drops below a critical level and so the body may cause you to lose consciousness to restore your blood flow which is (a "faint").

Common symptoms of "defecation syncope" or having a vasovagal response to poop include.

Dizziness or lightheadedness.
Nausea.
Cold and clammy skin or sweating.
Visual disturbances like blurriness in your vision.
And sudden fainting or loss of consciousness.

To prevent the vasovagal response to pooping or "defecation syncope".

Avoid straining when pooping and treat any underlying constipation to reduce your need to bear down and strain when pooping.

Stay hydrated, by drinking plenty of water and hydrating fluids.

And if you feel dizzy, lay down immediately, as laying down helps to return blood to your heart and brain.

And when you get off the toilet, stand up gradually and rise slowly to allow your body to adjust.