Heart burn is a symptom of acidity in your stomach leading to reflux of acid/gas into your foodpipe. The reasons for the acidity could be smoking, alcohol, spicy food, etc. Lack of exercise and being overweight also could lead to heartburn. The underlying cause should be remedied for permanent cure. All bland food including fruits could be taken. Go to bed at least after 2 hours of having had dinner. Adding an extra pillow might help. Medicines can be prescribed by your doctor which could provide you dramatic relief.