IBS is quite similar to IBD. Some of the symptoms are the same and you can usually follow IBD protocols to relieve IBS. However, the main difference between IBS and IBD is that Irritable Bowel Syndrome is not characterized by chronic inflammation. So, with an IBS diagnosis there are symptoms of digestive disorders but there is no detectable damage or inflammation. To read more about diagnosing Crohn’s and Colitis visit the pages dedicated to diagnosing IBD.
In summary, IBS affects the nerves in the gut. Much like IBD, it can be healed by sealing your gut and getting rid of a bacterial imbalance.