Our expert says:
Heartburn is often caused by the upper valve of the stomach not working correctly due to a hiatus hernia. Certain foods and supplements can aggravate heartburn. See http://www.animatedmedical.com/Hiatushernia/hiatushernia.html
Treatment is with anti-acids like Nexium and/or operation if the hernia is very big. Your doctor can see how big it is by referring you for a gastroscopy. (http://www.gihealth.com/html/test/gastroscopy.html)
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