There are many causes of heartburn and sometimes you are totally unaware of what are they until you experience its signs and symptoms. The risk factor of having heartburn is it can develop into esophagitis.
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. The usual foods we eat like orange, tomatoes, alcohol and chocolate can also lead to stomach acid.
To stop experiencing heartburn stop drinking and eating foods that increases the chances of having stomach acid. Click the link to know information on how to treat heartburn: http://tinyurl.com/nrznp7d