Why You Feel Dizzy or Nauseous when You Poop

What's the Root Cause? by Dr Vikki Petersen · Feb 15, 2025 · 6m

Why do you feel dizzy or nauseous when you poop and is it normal?

It's not normal and it's called a vasovagal response.

Your vagus nerve gets irritated when you bear down and in response your heart rate goes down, your blood pressure goes down and you can feel nauseous or faint.

The reason why is constipation, even though you perhaps you haven't realized it. Many Americans are constipated and don't know it because their doctor has told them that skipping days is probably "normal" for them.

This isn't true. Normal bowel rhythm is 1 to 3 times per day of a soft, formed, easy to pass bowel…