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Why do I feel weak after pooping?

Why do I feel weak after pooping?

Weakness after defecation is due to vaso vagal reaction. When you tense abdominal muscles or strain to pass stool, vagus nerve is stimulated which decreases the heart rate. Also, blood flow to the heart decreases causing the blood pressure to drop. Hence, decreased heart rate with drop in blood pressure together makes you light headed or weak after passing stool.

Last updated on 01 Apr 2021

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