Functional Dyspepsia

Medically written by
A/Prof Viraj Kariyawasam
MBBS, FRACP, MRCP, PhD
Gastroenterologist & Hepatologist
Associate Professor – Macquarie University
Head of IBD Service – Blacktown Hospital
Last reviewed: March 2026

1. What is Functional Dyspepsia?

Functional dyspepsia is a common disorder of gut–brain interaction characterised by persistent or recurrent upper abdominal symptoms without an identifiable structural cause on routine testing. Although symptoms can be distressing, functional dyspepsia does not cause damage to the stomach or lead to cancer.

It affects people of all ages and is one of the most common reasons for upper gastrointestinal symptoms seen in clinical practice.

2. Causes & Risk Factors

The exact cause of functional dyspepsia is not fully understood. It is thought to result from a combination of altered gut–brain signalling, increased sensitivity of the stomach, and changes in stomach motility.

Contributing factors may include stress, anxiety, prior gastrointestinal infection, Helicobacter pylori infection, and altered gastric emptying. Symptoms are often worsened by certain foods or eating patterns.

3. Symptoms & How It May Present

Symptoms are centred in the upper abdomen and may vary in severity over time.

Common symptoms include upper abdominal discomfort or pain, early fullness when eating, bloating, nausea, excessive belching, and burning or pressure in the upper abdomen. Symptoms may overlap with reflux or irritable bowel syndrome.

4. How Is It Diagnosed?

Functional dyspepsia is diagnosed based on symptoms and exclusion of other conditions.

Initial assessment includes a detailed history and blood tests. Gastroscopy is often recommended if symptoms are persistent, severe, associated with alarm features, or begin for the first time after the age of 50. If investigations are normal, a diagnosis of functional dyspepsia is made.

5. Treatment & Management Options

Management focuses on symptom control and improving quality of life.

Treatment may include acid-suppressing medications, therapies to improve stomach motility, treatment of Helicobacter pylori if present, and dietary modification. In some cases, gut–brain targeted therapies or low-dose neuromodulators may be helpful.

6. Living With / Managing Functional Dyspepsia

Functional dyspepsia is a chronic condition with symptoms that may fluctuate over time.

Understanding the condition, identifying symptom triggers, regular meals, stress management, and ongoing medical support can significantly improve symptom control.

7. Prevention & Risk Reduction

There is no guaranteed way to prevent functional dyspepsia.

Maintaining regular eating habits, avoiding large or fatty meals, managing stress, and seeking early medical advice for persistent symptoms may reduce symptom severity.

8. When to Seek Medical Advice

Medical review is recommended for persistent or recurrent upper abdominal symptoms that interfere with daily activities.

Urgent assessment is required if symptoms are associated with weight loss, vomiting, difficulty swallowing, gastrointestinal bleeding, or iron deficiency.