It is likely to be gastritis. You may require antacids. The following lifestyle changes may help: - Don't skip meals and don't crash diet. - Reduce/ Avoid spicy,fried, fatty, junk and oily food - Avoid/ Limit drinking coffee, tea and carbonated drinks to once a day - Exercise regularly (minimum 30 mins) - Increase daily intake of water to 3 liters - Avoid/Stop smoking and drinking if you have the habit - Reduce stress through methods such as yoga/meditation.

This may be due to acidity but we have to rule out cardiac abnormalities though some cardiac stress tests. As at rest ECG may be normal. If everything normal then nothing to worry about.