Does IBS Cause Lower Back Pain?

Does IBS Cause Lower Back Pain?

In my practice, clients with a primary presenting symptom of lower back pain. Often also report having irritable bowel syndrome (IBS) symptoms such as bloating, constipation, diarrhea and gas.

To the client, these two conditions appear unrelated.

But are they?

Does IBS cause lower back pain?

Research has found that IBS is associated with unrelated extra-intestinal symptoms, including Chronic Fatigue Syndrome, depression and Fibromyalgia.

Association of symptoms means that they usually appear together. It does not mean that one condition may cause the other.

For example, because many of my clients with lower back pain also have IBS does not mean the latter caused the former.

To say that one condition causes another, you would have to observe that by treating one, the other also resolves.

In this article, I will outline a client case study whose back pain and IBS symptoms resolved on a low FODMAP diet.

Meet Kelly

Kelly, 35, is a yoga teacher working in downtown Ottawa.

While participating in a yoga class, I noticed that she avoided doing any postures involving twisting.

After the class, I asked whether Kelly suffered from lower back pain.

She said she did.

Kelly explained that the pain had started some four weeks previously. She had been receiving chiropractic care with a limited reduction in symptoms.

I indicated that if physical symptoms do not respond to physical therapy, an underlying condition often drives the problem.

I suggested that she come for a consultation with me so that I could assess her back pain and what might be causing it.

A week later, she came for an initial consultation, and I took a complete medical history.

As well as suffering from lower back pain, she complained of digestive symptoms, including abdominal discomfort, bloating, diarrhea and gas. She had experienced these symptoms since she was a teenager.

She had tried removing gluten from her diet to help her symptoms (which it did) but said that it was socially too stressful to maintain the diet.

On examination, I identified that her muscles were hypertonic or tight, and some of the primary muscles supporting her lower back were not functioning well.

I explained to Kelly that, in my experience, tight and poorly functioning muscles are often a cause and sign of low-grade inflammation.

Furthermore, this inflammation often stems from problems in your digestion.

Some years previously, Kelly was referred by her family to a Gastroenterologist about her digestive symptoms and was diagnosed with IBS.

Recent research has found that approximately 80% of people with IBS have a condition called Small Intestinal Bacterial Overgrowth, or SIBO.


SIBO is a condition where your friendly bacteria that usually live in your large bowel overgrow into your small intestine. One of the functions of the friendly bacteria is to break down fermentable carbohydrates known as FODMAPs.

When this process occurs in the small bowel, it can lead to a build of gases causing the symptoms of bloating, constipation, diarrhea, and inflammation that can spread throughout the body.

Research has also shown that a low FODMAP diet can help reduce symptoms of IBS.

With this information in mind, I explained to Kelly that I thought her poor digestive health might be causing her back pain and suggested that she try following a low FODMAP diet for two weeks.

Due to her experience of following diets, she was a little anxious but said she would think about it. I said that was, of course, her decision and to do what she could manage without getting too stressed.

Two weeks later, at our follow-up appointment, she said that, on reflection, she had decided to embrace the diet entirely. Furthermore, she reported significant improvement in her digestive symptoms and lower back pain.

Interestingly, she noticed that when she veered away from the diet on one occasion, she observed her lower back symptoms worse the following day.


Based on the clinical outcome, we could assume that Kelly’s back pain resulted from her IBS.

Can we expect everyone with lower back pain and IBS to have the same outcome? The answer, of course, is no.

We would have to conduct a much larger study to make that conclusion.

That being said, changing one’s diet is a relatively low-risk therapeutic intervention compared to long-term use of anti-inflammatory medication.

If you do suffer from lower back pain that has not responded to the physical treatment and, at the same time, suffer from IBS symptoms, following a 2-week low Fodmap diet would be a safe option.


This article is not intended to provide medical advice, diagnosis or treatment.

Now I’d like to hear from you. Do you suffer from lower back pain and IBS? Have you tried a low FODMAP diet? Let us know in the comments below.


  1. How did things work out with kelly in the longer run. I’ve had this for the last 6 months. Soooo tired of backpain. A few weeks ago I found out that low fodmap helps me be in less pain. But am I supposed to do this forever? Is there something underlying causing this? My bloating is not THAT much, e.g. micro hernia or something?

  2. This really piqued my interest because I’ve been experiencing pain in my back on my lower left side. I was checked for kidney stones and it was negative, I had injections put in my spine thinking it would help any back pain but it hasn’t helped the pain I’m having and it comes and goes but when it hits the pain is so bad that it takes me to my knees and takes my breath. It’s the worst pain I’ve had in a very long time and I have constant constipation and diarrhea along with GERD and I’m on 3 different stomach medications now. Does this sound like the IBS? Thank you so much.
    Christine Holmes

    1. Hi Christine, The pain could be connected with your current digestive issues. I would seek out a Functional Medicine Practitioner to find out. Kind regards Dominick

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