Published: January 16, 2025
Your gut health influences far more than digestion. When your gut microbiome is out of balance — a state called dysbiosis — your body sends warning signals.
Some are obvious (bloating, irregular bowel movements), but others might surprise you (skin issues, mood changes, frequent colds).
Here are 7 signs your gut might need attention — and what to do about it.
What it looks like:
Why it happens:
When harmful bacteria overgrow or beneficial bacteria are depleted, fermentation patterns change. This can produce excess gas or inflammatory compounds that irritate your gut lining.
What to do:
If bloating persists despite diet changes, see a gastroenterologist to rule out IBS, SIBO, or food intolerances.
What it looks like:
Why it happens:
Gut bacteria produce compounds that regulate intestinal motility (the movement of food through your digestive tract). Dysbiosis can slow things down (constipation) or speed them up (diarrhea).
What to do:
Persistent changes in bowel habits warrant medical evaluation to rule out IBD, celiac disease, or other conditions.
What it looks like:
Why it happens:
About 70% of your immune system lives in your gut. When your microbiome is unbalanced, immune function suffers. You may be more susceptible to infections and less able to fight them off.
What to do:
If you have frequent or severe infections, consult a healthcare provider to rule out immune disorders.
What it looks like:
Why it happens:
The gut-skin axis is a real thing. Gut dysbiosis and increased intestinal permeability ("leaky gut") can trigger systemic inflammation, which often shows up in your skin.
Imbalanced gut bacteria may also affect:
What to do:
If skin issues persist, see a dermatologist or functional medicine provider who understands the gut-skin connection.
What it looks like:
Why it happens:
Gut bacteria produce neurotransmitters and influence inflammation — both of which affect energy and cognition. Dysbiosis can contribute to:
What to do:
If fatigue is severe or doesn't improve, see a doctor to rule out thyroid issues, anemia, or other medical conditions.
What it looks like:
Why it happens:
The gut-brain axis connects your gut microbiome to your brain. Gut bacteria produce neurotransmitters (serotonin, GABA, dopamine) and inflammatory compounds that affect mood.
Research shows gut dysbiosis is linked to anxiety disorders and depression.
What to do:
Important: Gut health is one factor among many. Don't skip therapy or medication if you need it.
What it looks like:
Why it happens:
Dysbiosis and intestinal permeability can make your gut more reactive to certain foods. Changes in bacterial populations may also affect your ability to digest specific compounds (like lactose or fructans).
What to do:
Food intolerances can improve as your microbiome rebalances.
If you're experiencing these symptoms, several factors may have contributed:
Good news: Most gut imbalances are reversible with time and the right habits.
Start here:
Read our full Beginner's Guide to Gut Health →
See Gut-Healthy Foods to Add →
While many gut issues improve with diet and lifestyle changes, some require medical evaluation:
See a doctor if you have:
Don't self-diagnose serious conditions. Get proper medical evaluation.
Your gut communicates with your entire body. Digestive symptoms, skin issues, mood changes, and frequent infections can all signal an unhealthy microbiome.
The good news: Gut health is largely within your control.
Start simple:
Track your symptoms. Most people notice improvements within 2-4 weeks of gut-supportive habits.