Acid reflux vs. Heartburn vs. GERD: Symptoms, causes, and key differences

Acid reflux, heartburn, and GERD are distinct digestive conditions with varying symptoms and severity. Acid reflux involves stomach acid flowing back into the oesophagus, causing irritation. Heartburn is a burning sensation in the chest, often linked to acid reflux. GERD is a chronic form of acid reflux that requires medical attention to prevent complications.