Diseases & care
Indigestion and heartburn explained
Indigestion and heartburn are very common and usually harmless, but they can be uncomfortable and sometimes worrying, especially when the burning feeling is in the chest. This guide explains, in plain English, what indigestion and heartburn are, why they happen, what you can do to ease them, and the warning signs that mean you should see a doctor. It also explains why a burning chest is occasionally confused with a heart problem. This is general education, not personal medical advice, and it names no medicine doses. If someone has severe or crushing chest pain, pain spreading to the arm or jaw, breathlessness, or sweating, treat it as a possible heart attack and phone 999.
Education and reference only. This article explains how treatments work in plain language — it contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician.
What indigestion and heartburn are
Indigestion, sometimes called dyspepsia, is a general term for discomfort in the upper tummy, often after eating. It can feel like fullness, bloating, burning, or an ache high in the stomach, sometimes with burping, nausea, or bringing up a little food or bitter fluid. Heartburn is a particular symptom: a burning feeling that rises from the stomach up behind the breastbone, sometimes reaching the throat and leaving a sour taste. It happens when acid from the stomach travels back up the food pipe (oesophagus), which is not built to cope with acid. When this reflux happens often, it may be called gastro-oesophageal reflux disease, or GORD. Despite the name, heartburn has nothing to do with the heart; it just happens to be felt in the chest.
Why it happens
The stomach makes acid to help digest food, and a ring of muscle at the top of the stomach normally keeps it in. Indigestion and heartburn occur when acid irritates the stomach lining or leaks back into the food pipe. Common triggers include large or fatty meals, spicy or acidy foods, coffee, alcohol, and fizzy drinks; eating late and lying down soon after; being overweight; smoking; stress; and pregnancy, when hormones and the growing baby raise pressure in the tummy. Some medicines, such as certain painkillers, can also irritate the stomach. A stomach bug called Helicobacter pylori can cause persistent indigestion in some people. Often no single cause is found, and symptoms come and go with lifestyle and diet rather than pointing to any serious disease.
Self-care and lifestyle
Many people can ease indigestion and heartburn with simple changes. Eating smaller, more regular meals, and not eating within three or four hours of bedtime, gives the stomach time to empty. It helps to cut down on known triggers such as rich, fatty, or spicy food, coffee, alcohol, and fizzy drinks, and to stop smoking. Losing excess weight, wearing looser clothing, and raising the head of the bed can reduce night-time reflux. Managing stress may also help. Keeping a simple diary of what brings symptoms on can reveal personal triggers. These measures often reduce how often symptoms occur, and combined with occasional pharmacy remedies they are enough for most people without the need to see a GP.
Pharmacy options and when they help
A community pharmacist can recommend over-the-counter treatments for occasional indigestion and heartburn and advise on how to use them safely. Antacids and similar products can neutralise or reduce stomach acid to ease symptoms quickly, and other medicines that lower acid production are available for more troublesome reflux. These are helpful for short-term relief, but frequent or long-term symptoms should be assessed rather than simply masked. A pharmacist can also check whether any of your regular medicines might be contributing, and can tell you when it would be wise to see a GP. If you find yourself needing acid remedies most days for more than a couple of weeks, that is a signal to seek a proper assessment rather than continuing to self-treat.
Red flags and when to see a doctor
Most indigestion is harmless, but some symptoms need medical review to rule out anything serious. See a GP if indigestion is frequent or does not improve with self-care and pharmacy remedies, or if it starts for the first time in someone aged 55 or over. Seek prompt advice for difficulty or pain when swallowing, food sticking, unintentional weight loss, repeated vomiting, vomiting blood, or black, tarry stools, as these can point to a problem needing investigation. Because heartburn is felt in the chest, it is occasionally mistaken for heart trouble. If chest pain is severe or crushing, spreads to the arm, neck, or jaw, or comes with breathlessness, sweating, or feeling faint, do not assume it is indigestion — phone 999, as this could be a heart attack.
In short
Key takeaways
- Indigestion is upper-tummy discomfort after eating; heartburn is a burning feeling as stomach acid rises into the chest.
- Common triggers include large or fatty meals, eating late, alcohol, smoking, being overweight, and pregnancy.
- Smaller meals, avoiding food before bed, weight loss, and pharmacy antacids ease symptoms for most people.
- See a GP for frequent symptoms, new indigestion over 55, swallowing problems, weight loss, or blood in vomit or stools.
- This is general education, not personal medical advice; severe or crushing chest pain with breathlessness or sweating means phone 999.
Answers
Frequently asked questions
Is heartburn dangerous?
Heartburn itself is usually harmless and does not involve the heart, but because it is felt in the chest it can be confused with a heart problem. If chest pain is severe, spreads to the arm or jaw, or comes with breathlessness or sweating, phone 999.
How can I ease indigestion at home?
Eat smaller meals, avoid eating within a few hours of bedtime, cut down on fatty and spicy foods, alcohol, and smoking, and lose excess weight if needed. A pharmacist can recommend antacids or other remedies for occasional symptoms.
When should I see a doctor about indigestion?
See a GP if indigestion is frequent, does not settle with self-care, or starts for the first time when you are 55 or over. Seek prompt advice for trouble swallowing, weight loss, repeated vomiting, or blood in vomit or stools.
Sources
Where this is drawn from
- NICE CG184: Gastro-oesophageal reflux disease and dyspepsia in adults.
- NICE Clinical Knowledge Summaries — Dyspepsia (unidentified cause).
- NHS — Indigestion and Heartburn and acid reflux.
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