"Irritable Bowel Syndrome" - what do we know?

Okay . . . so yesterday we spoke about the connection between the "vagus" nerve and "irritable bowel syndrome".
First question . . . what exactly is "IBS" and why can it be sooooooo debilitating???
Well . . . "irritable bowel syndrome" is a "common" disorder that affects the large intestine . . . with symptoms being . . . food intolerances, fatigue, difficulty sleeping, cramping, abdominal pain, mucus in stool, bloating, gas and diarrhea or constipation . . . with some times both.
And science states . . . this is a "chronic condition" that "isn't" life-threatening . . . has "NO" known cure . . . and will have to be managed long term.
They state that certain foods, medications, infections, stress and a "change" in bacteria in the bowel . . . definitely has a lot to do with this condition.
They also state . . . IBS is a painful condition associated with significant "psychological distress" and "psychiatric comorbidities" . . . which can be triggered by high levels of anxiety, depression or suicidal thoughts . . . with this all impacting the "quality of life".
Okay . . . now the first thing that upsets me in their statements is this . . . the fact that IBS is called a "COMMON" disorder.
This is "NOT" right people!!!!
"NO" illness should be a "COMMON" disorder . . .
So let's break it down to better understand . . .
Science says there are 4 different kinds of "Irritable Bowel Syndrome" . . .