It is not only a mouthful but a lot to talk about. Ultimately, disorders affect any part of the gastrointestinal tract, from the esophagus to the intestines. Some common functional gastrointestinal disorders include internal bowel syndrome and dyslexia. These conditions carry abdominal cramping and discomfort, gas, and bloating symptoms. Bloating has been reported in up to 96 percent of patients with IBS. Primary features of FG ids are abdominal motility, high nerve sensitivity, and brain-gut dysfunction.