Functional gastrointestinal disorder is a term used to describe a group of chronic digestive conditions which affect the gastrointestinal tract, without any visible or structural abnormalities. These disorders are usually characterized by a variety of symptoms ranging from abdominal pain, bloating, constipation, and diarrhea. However, there are some synonyms which are alternative terms used to refer to this condition. These include non-ulcer dyspepsia, irritable bowel syndrome (IBS), functional gastrointestinal disease, and functional bowel disorder. Although there is no cure for functional gastrointestinal disorders, the symptoms can be significantly managed through a variety of treatments such as medication, dietary changes, and therapy.