What is heartburn?

Heartburn is a burning sensation in the chest that occurs when stomach acid moves up into the gullet (acid reflux). These symptoms can easily be managed with lifestyle changes and/or products from pharmacy.

Symptoms can often be treated without a visit to your GP.3


Symptoms of Heartburn

Symptoms of heartburn include:
  • A burning sensation in the middle of your chest
  • An unpleasant sour taste in your mouth
  • Bad breath
  • Bloating and feeling sick
Symptoms are often more intense:
  • After eating
  • When lying down
  • When bending over

What Causes Heartburn?


Certain foods – such as chocolate and fatty, or spicy acidic food can cause heartburn.
Easting a large meal or eating too late at night can also bring it on.


During pregnancy, hormones cause the valve at the top of the stomach to relax, which can lead to heartburn.4 The valve allows stomach acid to pass into the gullet and irritate the lining.

Pressure on the stomach may also push contents back up the gullet.


Some medicines can trigger or worsen heartburn e.g.5

  • Painkillers – Ibuprofen, Aspirin
  • Bone strengthening drugs
  • Iron supplements
  • Blood pressure drugs
  • Anti-anxiety drugs
  • Tricyclic antidepressants
  • Antibiotics
  • Sleeping pills and sedatives
  • Potassium supplements


Being overweight can put pressure on the valve between the bottom of your gullet and your stomach. This lets acid rise up into our gullet which causes a burning sensation.


Nicotine from tobacco relaxes the valve between the gullet and stomach.6 This can allow stomach acid and juices, to go back up (reflux) into the gullet which causes heartburn.


Excessive alcohol could weaken the valve between the stomach and the gullet and can lead to the backward flow of stomach contents – and that causes heartburn/acid reflux.7

Triggers can include alcohol and caffeinated products, such as coffee.


Stress can reduce the production of substances called prostaglandins which normally protect he stomach from the effects of acid. This could increase your sensitivity to the effects of stomach acid.

Stress can also cause the gastric muscles to contract. This can push the acid contents of the stomach up towards the valve at the top of the stomach. Many people produce more acid when they are anxious and this can cause them to experience heartburn. Tiredness or exhaustion may also cause changes in the body which lead to increased in acid reflux.8

Self Care Advice

10 tips to relieve heartburn this festive season

For heartburn sufferers it’s hard to resist and we all want to unwind and enjoy ourselves but for those of us prone to heartburn it’s best to be a little more cautious.

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Heartburn At Night: How to Improve Sleep Quality with Heartburn

Ever wondered why your heartburn appears to be worse at night?

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Acid Reflux & Stress

We’ve all experienced those ‘tight knot’ feelings in our stomach when stressed. Find out how stress & acid reflux are related.

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Differences between heartburn and acid reflux

Heartburn & acid reflux; what exactly are they and how do they differ?

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How diet affects heartburn

Find out more about how your food choices and diet can effect heartburn.

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Pyrocalm Control® 20mg Gastro-Resistant Tablets. For the short-term treatment of reflux symptoms in adults.
Contains 20 mg Omeprazole. Always read the label. Medicines can affect the unborn baby.
Always talk to your doctor or pharmacist before taking any medicine in pregnancy.