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You could be having symptoms of a gastric ulcer. You need to get an Upper GI endoscopy
done to confirm. You need to stay away from spicy, hard, hot food. Have soft, cool, bland diet like yoghurt, buttermilk, fresh fruits and green leafy vegetables as well. Drink plenty of water. If you experience heartburn
you can take over the counter PPIs but best under medical supervision after your Doctor advises.