Functional Bowel Disorders (or FBD) is a term that incorporates the myriad of problems with how your stomach and bowels operate or work. Generally, Irritable Bowel syndrome and functional dyspepsia are functional ailments.
If all your organs are functioning normally, but still some signs persist, then it shows something is wrong. It may be a challenge for the doctor to diagnose functional bowel disorder since the symptoms are naturally occurring. Upper gastrointestinal symptoms such as feeling bloated, stomach pain, and nausea. Whereas, Lower GI symptoms such as diarrhea, constipation, and stomach pain.