Heartburn is an unpleasant condition that occurs when acid from the stomach rises up into the oesophagus and the throat where it causes a burning pain. This action is called acid reflux.

Affecting 25-30% of UK adults, heartburn is becoming more common, possibly as a result of increased stress, unhealthy diets and over-eating. Heartburn is particularly common during pregnancy with more than 72% of pregnant women suffering during their last trimester. 

The pain of heartburn can last for several hours or more and is often made worse by eating. Many people suffer sleepless nights as a result of heartburn because lying down can trigger the condition and increase the pain.