Occurs in > 20 % of population.
- Functional Dyspepsia. Up to 75% have a functional (idiopathic or nonulcer) dyspepsia with no underlying cause on diagnostic evaluation. “Functional (idiopathic or nonulcer) dyspepsia requires exclusion of other organic causes of dyspepsia”.
- Dyspepsia secondary to organic (structural or biochemical) disease. 25 % of patients with dyspepsia have an underlying organic cause. Main organic causes of dyspepsia are PUD, GERD, NSAID-induced dyspepsia, and gastric malignancy. Also, chronic pancreatitis, celiac disease, etc.
Guidelines from the American College of Gastroenterology for the management of Dyspepsia.
https://gi.org/guideline/management-of-dyspepsia-2/