Irritable Bowel Syndrome

Irritable Bowel Syndrome -IBS is a common functional gastrointestinal disorder; there is no visible structural damage to the digestive tract, so it is a diagnosis of exclusion when there is no pathology to be found.  But there are chronic, recurring digestive symptoms that can be debilitating.  Patients commonly experience the following symptoms:

Abdominal pain or cramping
Bloating
Gas
Diarrhea (IBS-D)
Constipation (IBS-C)
Alternating diarrhea and constipation (IBS-M or mixed type)
Urgency or incomplete bowel movements

The leading theory behind IBS is that there is dysfunctional communication between the gut/brain axis, leading to 
gut motility dysfunction or visceral hypersensitivity (increased sensitivity to gut sensations). 

But approximately 60% of IBS has been related to SIBO, with its underlying causes of:

Post-infectious IBS is where people experience persistent abdominal pain, bloating, and altered bowel habits after food poisoning.
Stress or anxiety
Imbalance in gut microbiome (dysbiosis)
Hypothyroidism