Most of us grow up thinking the appendix is a pointless little organ — a leftover from evolution that does nothing.
In fact, for years, doctors had no issue removing it at the first sign of trouble. No harm, no foul, right?
But shocking new research suggests that removing the appendix in childhood might carry unexpected consequences — including a higher risk of developing mental health disorders later in life.
The Appendix: More Than Just a Vestigial Organ
For decades, the appendix was seen as a biological relic. But scientists now know it plays a key role in gut health. It acts as a “safe house” for good gut bacteria, helping the body restore balance after things like infections or antibiotic use.
The Gut-Brain Connection
The gut and brain are deeply connected — they’re constantly talking through the gut-brain axis. A healthy gut microbiome helps regulate mood, behavior, and brain function. If that balance is thrown off, it can lead to issues like anxiety, depression, and even cognitive problems.
The Surprising Study
A large Swedish study followed 752 people who had their appendix removed in childhood. Compared to those who didn’t have the surgery, the appendectomy group was:
20% more likely to develop a psychiatric disorder
At higher risk for depression, bipolar disorder, and anxiety
Interestingly, children who had appendicitis but didn’t undergo surgery did not show the same risks — pointing to the removal itself as the likely cause.
Is Surgery Always Necessary?
Because of findings like this, some doctors are now rethinking how they treat appendicitis. In mild cases, antibiotics alone might be enough — avoiding surgery and possibly protecting mental health down the line.
What You Can Do
If you or your child is facing appendicitis, ask your doctor about all options. And for everyone, supporting your gut health through good nutrition, probiotics, and stress management is one way to help keep your brain healthy too.
