Man with headache
Man with headache
Man with headache

When it comes to Small Intestinal Bacterial Overgrowth (SIBO), the digestive symptoms are just the start. SIBO doesn’t just affect your gut – it can show up in all sorts of unexpected ways.

Below are some common non-digestive SIBO symptoms that can sneak up on you:

  • Fatigue: Feeling constantly drained? One of the most common non-digestive symptoms of SIBO is fatigue. Bacterial overgrowth can sabotage nutrient absorption leaving you feeling weak and worn out.

  • Skin issues: Eczema, rosacea, and acne are all common side effects of SIBO. When your gut isn’t functioning properly, your skin pays the price.

  • Brain fog: If you're struggling with concentration, memory, or confusion, SIBO could be the culprit. Due to the connection between your gut and brain, known as the gut-brain axis, gastrointestinal issues can impact brain function.

  • Joint and muscle pain: Inflammation caused by overgrown gut bacteria can lead to pain and stiffness throughout your body.

  • Mood changes: Depression and anxiety are often linked with SIBO. Due to the connection between your gut and brain, known as the gut-brain axis, gastrointestinal issues can impact brain function. 

  • Headaches and migraines: While the cause of the connection between SIBO and headaches has yet to be discovered, there is evidence of a link between the two. SIBO and IBS 


Neck with eczema
Neck with eczema
Neck with eczema

If any of these symptoms sound familiar, it’s a good idea to take a closer look at your gut health and to consider a SIBO breath test. Consult with a trusted health care professional for a proper diagnosis and treatment plan. Your body deserves to feel good from the inside out. 

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Small Intestinal Bacterial Overgrowth (SIBO) affects 1 in 9 people. By providing science-backed resources, research and solutions we support patients on their journey to health.

Learn More

hello@siboawareness.org

This information is in no way intended to replace the guidance of your doctor. SIBOawareness.org does not provide medical advice, diagnosis or treatment.

Newsletter

Join our mailing list: Be the first to hear about new research, receive discounts from our supporters and learn more about managing your SIBO!

© 2025 Gut Microbiome Foundation.

All Rights Reserved

Logo

Small Intestinal Bacterial Overgrowth (SIBO) affects 1 in 9 people. By providing science-backed resources, research and solutions we support patients on their journey to health.

Learn More

hello@siboawareness.org

This information is in no way intended to replace the guidance of your doctor. SIBOawareness.org does not provide medical advice, diagnosis or treatment.

Newsletter

Join our mailing list: Be the first to hear about new research, receive discounts from our supporters and learn more about managing your SIBO!

© 2025 Gut Microbiome Foundation. All Rights Reserved

Logo

Small Intestinal Bacterial Overgrowth (SIBO) affects 1 in 9 people. By providing science-backed resources, research and solutions we support patients on their journey to health.

Learn More

hello@siboawareness.org

This information is in no way intended to replace the guidance of your doctor. SIBOawareness.org does not provide medical advice, diagnosis or treatment.

Newsletter

Join our mailing list: Be the first to hear about new research, receive discounts from our supporters and learn more about managing your SIBO!

© 2025 Gut Microbiome Foundation.
All Rights Reserved