What it is
A burning sensation in the chest or throat caused by stomach acid refluxing into the oesophagus.
A burning sensation in the chest or throat caused by stomach acid refluxing into the oesophagus.

At a glance
What it is
A burning sensation in the chest or throat caused by stomach acid refluxing into the oesophagus.
Commonly experienced as
Evidence context
Research-supportedHistory & Origin
Heartburn is the hallmark symptom of acid reflux (gastro-oesophageal reflux disease, GORD) — a burning sensation felt behind the breastbone that rises from the stomach or chest toward the throat, often accompanied by a sour or acidic taste. It arises when the lower oesophageal sphincter fails to prevent stomach acid from refluxing upward. Triggers include large meals, lying down after eating, fatty or spicy foods, alcohol, caffeine, chocolate, tomatoes, citrus, and smoking. Stress and anxiety worsen reflux through both increased acid production and impaired sphincter function. Pregnancy, obesity, and hiatus hernia predispose. Simple lifestyle modifications resolve symptoms in most cases. Persistent, frequent heartburn warrants medical assessment and may require endoscopy to assess oesophageal health.
The Evidence
What research and clinical practice say about heartburn — and when to seek professional assessment.
Lifestyle changes and medical options are well-supported for heartburn
Heartburn has a well-researched evidence base across dietary, lifestyle, and medical approaches. Most people respond well to self-care, but persistent or severe symptoms need professional assessment to rule out underlying conditions.
Seek urgent care if you notice blood in stool or vomit, severe abdominal pain with rigidity, persistent vomiting, or unintentional weight loss alongside digestive symptoms. These may indicate a condition requiring prompt professional assessment and should not be managed with self-care alone.
Avoiding known triggers — large meals, fatty or spicy foods, alcohol, caffeine, and lying down after eating — is strongly supported by evidence. Alginate-based preparations have strong evidence for symptom relief. Acupuncture shows moderate evidence as an adjunct approach, though research is less extensive.
Heartburn results from stomach acid entering the oesophagus when the lower oesophageal sphincter is weakened or relaxed. Contributing factors include obesity, pregnancy, hiatus hernia, stress, and smoking. Frequent or persistent heartburn warrants medical review and may require endoscopy to assess oesophageal health.
Lifestyle modification is the first-line approach for most people. Over-the-counter alginate preparations offer well-evidenced short-term relief. Complementary options such as acupuncture may offer adjunct support for some individuals. Any complementary approach works best alongside — not instead of — professional care for ongoing symptoms.
If heartburn occurs more than twice a week, disrupts sleep, or does not respond to lifestyle changes, a healthcare professional should be consulted. Long-term unmanaged reflux can affect oesophageal health. A GP or gastroenterologist can advise on appropriate investigation and management options.
While lifestyle and medical approaches are well-supported, individual responses vary. Complementary approaches such as acupuncture have a more limited evidence base and should not be presented as primary management. Self-care is not a substitute for professional assessment when symptoms are frequent, severe, or accompanied by other warning signs.
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