Functional dyspepsia is commonly diagnosed using the Rome III criteria.
The diagnosis typically includes the following:
1. The presence of one or more chronic symptoms such as epigastric pain, epigastric burning sensation, postprandial fullness, or early satiety, which may be persistent or recurrent.
2. These symptoms are not relieved by defecation and should not be attributed to irritable bowel syndrome.
3. Organic diseases that could explain the symptoms must be ruled out.
Based on these criteria, a diagnosis of functional dyspepsia can be made. Since it is a diagnosis of exclusion, it is crucial in clinical practice to conduct thorough examinations according to the patient's specific condition to rule out the possibility of various organic diseases or drug-induced disorders.