Heartburn is a prevalent condition that affects millions of people worldwide. The burning feeling in the chest caused by the onset of heartburn can cause discomfort. The condition can be temporary or chronic if left unmanaged. It occurs when stomach acid flows back into the esophagus, causing irritation and discomfort. Recognizing the early symptoms of heartburn is crucial for timely intervention and effective management. Let’s look at the subtle indicators of heartburn. What is heartburn? Heartburn, known as acid indigestion or acid reflux, is a condition where the stomach acid rushes back up into the esophagus (a tube carrying food from the mouth to the stomach, and it is not designed to handle the corrosive effects of stomach acid). The acid reflux generally leads to a range of uncomfortable symptoms. The primary reason behind heartburn is a dysfunctional lower esophageal sphincter (LES). It is a muscle ring situated at the bottom of the esophagus that normally acts as a one-way valve, allowing foods and liquids to enter the stomach while preventing stomach contents from flowing back up into the esophagus. When the LES weakens or relaxes inappropriately, stomach acid can escape into the esophagus, leading to heartburn. Early symptoms of heartburn Burning sensation in the chest This is a common sign of the condition, often erupting from behind the breastbone.