There are lots of causes why heartburn suddenly occurs and sometimes you will just know it if you experience the symptoms. The risk factor of having heartburn is increasing the production of acid and structural problems that let the acid reflux into the esophagus.
Smoking and eating foods with high content fat can affect the function of the lower esophageal sphincter (LES). With this, the acid will reflux into the esophagus and if LES fails, heartburn will happen.Drink with caffeine like coffee and tea can increase stomach acid.
If you want to relieve yourself from heartburn, stop eating foods that can increase stomach acid. Visit the link below to know how you can cure heartburn: http://tinyurl.com/nrznp7d