Sudden heartburn: what to know

Heartburn is a burning sensation behind the breastbone when stomach contents irritate the oesophagus. A large meal, lying down soon after eating, alcohol, smoking, some medicines, or pressure on the abdomen can make reflux more noticeable. Hiatus hernia, gastritis, peptic ulcer, and ongoing acid reflux can also cause upper abdominal or chest discomfort.

The sensation may rise toward the throat and can come with a sour taste, belching, or irritation after meals. These features support reflux but do not prove it. Heart-related pain can feel like indigestion, so the setting, severity, duration, and accompanying symptoms matter.

Sit upright, loosen restrictive clothing, and avoid lying flat immediately after eating. Keep a note of foods, medicines, timing, and whether the discomfort changes with position. A pharmacist or clinician can advise whether an antacid or acid-reflux medicine is suitable, especially if you are pregnant or take other medicines.

Arrange a medical review if episodes keep returning, disturb sleep, cause difficulty swallowing, or lead you to rely on frequent self-treatment. Weight, meal timing, and abdominal pressure can influence symptoms, while conditions such as /conditions/acid-reflux/ and /conditions/hiatus-hernia/ may need targeted management.

Call emergency services for crushing or tight chest pain, pain spreading to the arm, jaw, back, or shoulder, severe breathlessness, sweating, faintness, or nausea with chest discomfort. Seek urgent medical care for vomiting blood, black stools, severe persistent pain, or food becoming stuck. Do not assume these symptoms are simple heartburn.

Ask whether your symptoms fit reflux or need heart testing, whether a medicine could be contributing, and which treatment is suitable for your health history. Ask what duration or swallowing change should prompt review and how to reduce episodes around meals and sleep.