Dizzy When Constipated? Here’s Why and How to Fix It

Why You Might Get Dizzy When You’re Constipated

First, know that constipation isn’t a common cause of dizziness, says Michael D. Brown, MD, gastroenterologist and professor of medicine at Rush University Medical Center in Chicago. However, in certain circumstances, it might contribute to it. Here’s what might be going on.

Straining or having a rather large or voluminous bowel movement (usually in the context of explosive diarrhea) or a gastrointestinal bleed, can cause what Dr. Brown calls a vagal event.