There are so many causes why heartburn suddenly happen and sometimes you do not know it until you finally experience the symptoms and signs. One risk factor of having a heartburn is it will increase the production of acid and structural problems that will allow acid reflux to the esophagus.
Smoking and eating foods with high content fat can affect the function of the lower esophageal sphincter (LES). With this, acid will be surely reflux into the esophagus and if LES suddenly fails, heartburn will happen. Drink with caffeine like coffee and tea can increase stomach acid.
To stop experiencing heartburn stop drinking and eating foods that increases the chances of having stomach acid. Click the link to help you cure heartburn: http://shorl.com/bysilafravaka