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Crohn’s Disease vs IBS

Published date: January 4, 2023 | Modified date:
by Dr Stephen Wangen

Here’s what we’re going to cover

  1. The Difference Between IBS and Crohn’s Disease
  2. IBS Symptoms vs Crohn’s Symptoms
  3. Diagnosing IBS vs Crohn’s Disease
  4. How To Tell If You Have IBS vs Crohn’s Disease
  5. Can You Have IBS and Crohn’s Disease At The Same Time?

What is the difference between Crohn’s Disease vs IBS?  There are many similarities, but also some key differences. Let’s explore this subject and create clarity around each one.

The Difference Between IBS and Crohn’s Disease

IBS stands for Irritable Bowel Syndrome.1 Crohn’s disease is a type of IBD or Inflammatory Bowel Disease. They can be confusing because they sound similar and there is a significant amount of overlap between the symptoms of these two conditions.4   And both can include inflammation.5

IBS Symptoms vs Crohn’s Symptoms

IBS and Crohn’s disease can both cause diarrhea, abdominal pain, constipation, gas, and bloating.  Crohn’s disease often includes weight loss and fatigue, but those problems may also be found in IBS patients. The key difference between IBS vs Crohn’s is that Crohn’s will often cause bloody diarrhea, whereas IBS will only rarely include blood in the stool. The blood from Crohn’s disease comes from ulcerations that may occur in the small intestine or the upper part of the colon.

What people often perceive about the severity of IBS vs Crohn’s disease is that Crohn’s disease is always worse. However, that is relative to the person experiencing either IBS or Crohn’s disease, because either one can send you to the emergency room.  The severity of the symptoms for both IBS and Crohn’s disease run the spectrum from very mild to very severe. And mild cases of Crohn’s disease can be far less severe than bad cases of IBS.

Diagnosing IBS vs Crohn’s Disease

Diagnosing IBS vs Crohn’s DiseaseThe key to separating these two conditions occurs when you have a colonoscopy and/or an upper endoscopy, usually with a gastroenterologist. A colonoscopy is the process of having a colonoscope, a long flexible tube not unlike the cable you’ve seen for cable tv, stuck up your rear end. An upper endoscopy is when the scope is placed down your throat into your stomach. In both cases, the cable has a light and a camera on the end of it.

During a colonoscopy, your doctor can see what the inside of your colon and the very end of your small intestine (the end that attaches to your colon) look like, as well as take biopsies of your intestinal tract. The upper endoscopy allows the doctor to look into your stomach and into the very first part of your small intestine. (The entire small intestine is about 20 feet long, so you can’t see all of it this way.)  If there is significant damage, meaning there are visible ulcerations or severe inflammation seen on the biopsy, then you may be diagnosed with Crohn’s disease, which is generally found in your small intestine or the upper end of your colon. If there is no obvious damage (no ulcerations), then you are likely to be diagnosed with IBS – Irritable Bowel Syndrome.

How To Tell If You Have IBS vs Crohn’s Disease

The only way to know for sure if you have IBS or Crohn’s disease is to see your gastroenterologist and have a colonoscopy and an upper endoscopy. There is no definitive test or way to tell the difference without these procedures. Even if you have a lot of blood in your stool, there are many other things that can cause that. And your doctor won’t know the diagnosis until they do a colonoscopy and an upper endoscopy.

If you do have ulcerations, depending on where the ulcerations are occurring you can have one of two types of IBD.  The two different types of IBD are Crohn’s disease and Ulcerative Colitis. Ulcerative Colitis is found in the colon. If you don’t have ulcerations or obvious severe inflammation, then it’s likely that you have IBS. There is no test for IBS. It is a diagnosis that results from excluding other problems, such as Crohn’s disease.

Can You Have IBS and Crohn’s Disease At The Same Time?

Can You Have IBS and Crohn’s Disease At The Same Time?You can in fact have both IBS and Crohn’s disease at the same time.3   If you have both, the IBS component is often not diagnosed until your Crohn’s disease goes into remission. When this happens, the ulcerations are no longer seen in your colon. However, you may still be experiencing digestive problems. When this happens, it is likely that you also have IBS.

Having both IBS and Crohn’s disease probably happens far more often than is realized, because it can be difficult to separate the two, especially when Crohn’s disease is mild or in remission. It’s always smart to see an IBS specialist and get that aspect treated and solved, because it may end up helping you with your Crohn’s disease.  At the IBS Treatment Center, we’ve often found this to be true, so we encourage you to schedule an appointment.

Although it has long been thought that having IBS does not lead to Crohn’s disease, recent research suggests that it can and that they are at different points in a spectrum of digestive disease.2   Either way, there is a great deal of hope for people suffering from IBS or Crohn’s disease. Conventional medications tend to treat only the symptoms, which can be important in the short term, but dealing with the underlying ecosystem of the digestive tract can lead to a much better outcome and more long-term relief.

Do you have IBS or Crohn’s disease?  If so, what are you doing about it?


  1. https://ibstreatmentcenter.com/what-is-ibs
  2. Spiller, R., Major, G. IBS and IBD — separate entities or on a spectrum?. Nat Rev Gastroenterol Hepatol13, 613–621 (2016). https://www.nature.com/articles/nrgastro.2016.141
  3. Abdul Rani R, Raja Ali RA, Lee YY. Irritable bowel syndrome and inflammatory bowel disease overlap syndrome: pieces of the puzzle are falling into place. Intestinal Research. 2016 Oct;14(4):297-304. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5083258/
  4. Halpin, Stephen J MBChB; Ford, Alexander C MBChB, MD, MRCP Prevalence of Symptoms Meeting Criteria for Irritable Bowel Syndrome in Inflammatory Bowel Disease: Systematic Review and Meta-Analysis. American Journal of Gastroenterology: October 2012 – Volume 107 – Issue 10 – p 1474-1482 https://journals.lww.com/ajg/Abstract/2012/10000/Prevalence_of_Symptoms_Meeting_Criteria_for.6.aspx
  5. Ng QX, Soh AYS, Loke W, Lim DY, Yeo WS. The role of inflammation in irritable bowel syndrome (IBS). J Inflamm Res. 2018 Sep 21;11:345-349https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6159811/