IBS and Endometriosis: The Overlap That Gets Missed in 75% of Cases

IBS and Endometriosis: The Overlap That Gets Missed in 75% of Cases

By Dr. Onikepe Adegbola, MD PhD — Johns Hopkins-trained physician-scientist

The average endometriosis diagnosis takes 7-10 years, partly because many patients are told they "just have IBS." Endometriosis and IBS share nearly identical symptoms — bloating, abdominal pain, diarrhea, constipation — but the mechanism is completely different. Knowing which one you have (or if you have both) changes treatment.

Key Takeaways

• Endometriosis affects 10% of reproductive-age women — most are initially diagnosed with IBS
• Key differentiator: endometriosis symptoms WORSEN around menstruation; IBS is less cyclical
• Bowel endometriosis directly involves the intestines in 5-12% of endo patients
• You can have BOTH conditions simultaneously — treating one doesn't resolve the other
• GI support with digestive enzymes and probiotics helps manage GI symptoms from both conditions

How to Tell the Difference

What to Do

1. Track symptoms with your cycle: If bloating/pain consistently worsen around your period, discuss endometriosis with your gynecologist
2. Don't accept "just IBS" if you have severe period pain
3. GI support regardless: FODMAP enzymes + probiotics help manage GI symptoms from both conditions
4. Anti-inflammatory support: Psyllium fiber promotes SCFA production which reduces inflammation

See our IBS and period guide and IBS and anxiety article.

This article is educational only. Endometriosis diagnosis requires medical evaluation, often including laparoscopy.