Types of Dyspepsia

Dyspepsia is a symptom and not a diagnosis

Functional dyspepsia was defined as “upper abdominal or retrosternal pain or discomfort, heartburn, nausea or vomiting or other symptoms considered to be referable to the proximal alimentary tract and lasting for more than 4 weeks, unrelated to exercise and for which no focal lesion or systemic disease can be responsible

Rome criteria
Symptoms of dyspepsia are divided into:

• reflux-type (retrosternal burning, regurgitation), 
• ulcer-type (epigastric pain on empty stomach relieved with bland food, antacids or acid suppression drugs), 
• dysmotility-type (postprandial fullness, distension, early satiety, nausea). 

Rome II criteria excluded symptoms of reflux-type, irritable bowel syndrome (pain relieved with defecation, with diarrhoea or constipation) and hepatobiliary diseases (biliary dyskinesia); chronicity of symptoms for 12 weeks at least (not continuous) during 12 months was emphasised.

Rome III criteria divided functional dyspepsia in 2 groups :
(i) predominant epigastric pain or burning (the epigastric pain syndrome) and
(ii) early satiety or fullness following a meal (the postprandial distress syndrome).

Further classification
Dyspepsia may be classified as :

1. Organic dyspepsia: erosive oesophagitis, gastric erosions, acute or chronic gastritis, gastric ulcer, duodenal ulcer, duodenitis, malignancy (carcinoma, lymphoma). Evidence of an organic disease is observed on upper gastrointestinal endoscopy (and gastric biopsy), or barium meal
2. Functional or non-ulcer dyspepsia: A patient with anxiety, worry over serious illness (cancer) and/or experiencing adverse events recently, is likely to suffer from dyspepsia. No organic lesion is detected on investigations.
3. Drug related
4. Extraintestinal systemic diseases such as diabetes mellitus, hypothyroid, hyperparathyroid, Addison’s disease, uraemia. Symptoms of endocrine diseases, are looked for after organic dyspepsia is excluded

Taken from here