IBS vs SIBO: Why You’re Still Bloated After the Treatment That Was Supposed to Help

The Tummy Clinic | July 11th, 2025

If you’ve followed the SIBO protocol and the bloating still returns by afternoon, you’re not alone—and you’re not broken. There’s another explanation that may finally make sense.

The “I-Did-Everything-Right” Frustration

You did the antimicrobial protocol. You restricted the foods. You followed the plan, maybe more than once.
But the bloating, the discomfort, the sense of something being off—it’s still there. And it’s deeply frustrating.

This is something we see every week. The issue may not be what you’ve done—but what’s been missing from the conversation.

When SIBO Is Not the Full Story

What SIBO Is

Small Intestinal Bacterial Overgrowth (SIBO) refers to an abnormal presence of bacteria in the small intestine. It can happen when something interferes with normal motility, gut structure, or immune function. According to recent international and Spanish consensus statements, SIBO should be suspected primarily in people with:

  • Gastroparesis or other diagnosed motility disorders
  • Abdominal surgeries, especially resections or adhesions
  • Immunodeficiencies or GI structural abnormalities
  • Long-term use of opioids or proton pump inhibitors (PPIs)

What It Isn’t

SIBO is not the default explanation for bloating, discomfort, or constipation—especially when no clear risk factors are present. And yet, many patients are placed on aggressive protocols without meeting clinical criteria or being given other possible explanations.

When that happens, treatments may offer only partial relief—or none at all—because the true condition has yet to be named.

The Overlooked Diagnosis: IBS

This is where Irritable Bowel Syndrome (IBS) often comes in.

IBS is one of the most common digestive diagnoses, yet still one of the most poorly explained. It doesn’t show up on endoscopy or standard lab tests—but that doesn’t mean it’s “in your head.” It’s a real, measurable condition rooted in a disruption of gut–brain communication.

The Core Drivers of IBS Include:

  • Heightened visceral sensitivity (gut nerves firing too easily)
  • Altered motility patterns, even with normal gut structure
  • Gut–brain signaling changes that amplify pain or urgency
  • Nervous system reactivity shaped by stress, life events, or trauma

We work with patients every day who say, “No one ever explained it this way before.”
And often, that clarity alone marks the beginning of relief.

The Flare Loop: A Self-Reinforcing Cycle

Here’s the pattern we see again and again:

  1. A flare begins—bloating, pain, constipation, urgency
  2. Alarm sets in: What did I eat? Do I need another cleanse?
  3. Restriction follows: fewer foods, more supplements
  4. Tension builds: the body tightens, symptoms return
  5. Fear increases—and the cycle deepens

We call this the flare loop—and breaking it takes more than another protocol.

Where Real Progress Begins

Progress doesn’t come from more elimination or stricter protocols. It begins with a shift in understanding—and a different kind of support.

For many patients, things start to change when we step out of the loop of treating symptoms in isolation and begin looking at the bigger picture: the gut, the nervous system, and the patterns that keep them locked together.

This isn’t a quick fix or a one-size-fits-all answer.
But there is a way forward—and it usually starts with being heard, understood, and finally shown how all the pieces fit together.

If you’ve been stuck in a cycle of protocols that only partially help—or make things worse—you’re not alone. There’s a different approach, and we’d be honoured to walk it with you.

Frequently Asked Questions

Managing IBS with diarrhea can be challenging, but making the right food choices can help. Here’s what works for many people with IBS:

  • Low FODMAP diet: This dietary approach helps reduce symptoms like diarrhea, bloating, and stomach pain. It involves removing certain foods and gradually reintroducing them to see which ones trigger your symptoms.
  • Easy-to-digest foods: Stick with foods like plain rice, cooked carrots, zucchini, and lean proteins (e.g., chicken, fish) to ease digestion.
  • Avoiding triggers: Steer clear of fatty, spicy, or fried foods, as well as dairy and caffeine. These can worsen symptoms for many people with IBS.

If you’re unsure which foods work for you, consulting with a healthcare provider can help you create a personalized meal plan.

Bloating, gas, and stomach pain are common in IBS. These symptoms often result from:

  • Gas buildup: Undigested food or fermentation in the intestines can cause gas and bloating.
  • Gut motility issues: In IBS, food may move too quickly or slowly through the digestive tract, leading to discomfort.
  • Food sensitivities: Certain foods like high FODMAP foods can cause bloating or pain.

Managing these symptoms typically involves diet modifications, stress management, and finding the foods that work best for your body.

IBS constipation can be tough, but there are ways to improve bowel movements:

  • Increase soluble fiber: Foods like oats, bananas, and carrots can help soften stool.
  • Stay hydrated: Drinking plenty of water helps keep things moving.
  • Exercise regularly: Physical activity helps stimulate digestion.

If these strategies don’t work, gentle laxatives or stool softeners might be considered, but always under the guidance of a healthcare professional.

Certain foods can make IBS symptoms worse, including:

  • High FODMAP foods: These include foods like onions, garlic, certain fruits (e.g., apples, watermelon), and dairy.
  • Fatty foods: Rich, greasy foods often cause discomfort for those with IBS.
  • Caffeine and alcohol: These can irritate the digestive system and increase symptoms like diarrhea or bloating.

By tracking your food intake and symptoms, you can start to identify which foods are causing flare-ups and work toward a personalized plan.

Constant constipation in IBS can be caused by:

  • Low fiber intake
  • Dehydration: Not drinking enough water can make stool hard and difficult to pass.
  • Stress: Emotional stress often affects digestion and can contribute to constipation.

If constipation persists despite lifestyle changes, consider speaking with a healthcare provider for further assessment and potential treatment options.

Severe bloating can occur when:

  • Gas is trapped in the intestines due to difficulty digesting certain foods or fermentation.
  • Slow motility: In IBS, the digestive system may move food too slowly, leading to bloating.

To manage bloating, consider reducing high FODMAP foods and incorporating more digestive-friendly meals. Stress management techniques like yoga or mindfulness can also help reduce bloating by calming the nervous system.