Hi, Welcome to health care magic, Stomach upset or discomfort is not a uncommon symptom among people seen nowadays. The causes could be acute gastritis, gastroenteritis,gastric ulcer or Helicobacter pylori infection. You must undergo routine blood investigations and H.pylori,liver function tests,urinalysis and stool for blood,abdominal ultrasound to detect the underlying cause. Treatment is mainly depend on the cause but you may take symptomatic treatment meanwhile. Antacids like h2 blockers (ranitidine) or proton pump inhibitors (pantoprazole or rabeprazole) will help to reduce excess acid production in stomach. You can also take digene gel or liquid or ulcero-protective agents like sucralfate or bismuth subsallicylate to reduce the burning sensation. Apart from medications you should also try some non-medical or dietary measures which are: 1) eat plain foods like boiled rice and green leafy vegetables without adding spices or oil. 2) avoid oily,spicy and fast foods 3) avoid eating full stomach at a time rather have small meals frequently. You must see gastro physician who can examine you properly and prescribe the treatment. Regards,