This page summarises publicly available NHS information for educational purposes only. It is not medical advice or a diagnosis. Always consult a qualified healthcare professional.
What is chest infection?
A chest infection is an infection of the lungs or airways, often following a cold or flu. The main symptoms are a chesty cough that may bring up green or yellow mucus, wheezing, shortness of breath, chest pain or discomfort, a high temperature, and aching muscles. Most chest infections are mild and clear up on their own within 7 to 10 days, but some can be serious and need treatment.
When NHS resources suggest seeing a GP
- You feel very unwell or your symptoms get worse
- You cough up blood or blood-stained mucus
- You've had a cough for more than 3 weeks
- You're pregnant or over 65
- You have a weakened immune system or a long-term condition (diabetes, heart, lung or kidney disease)
- You have chest pain that is severe or gets worse when breathing
Self-care information from NHS
- Get plenty of rest
- Drink lots of water to loosen mucus and make it easier to cough up
- Raise your head using extra pillows while sleeping to ease breathing
- Take paracetamol or ibuprofen to bring down a high temperature
- Drink a hot lemon and honey drink to soothe a sore throat
- Do not smoke — it makes chest infections worse
Common questions
How long does a chest infection last?
Most chest infections get better on their own within 7 to 10 days. A cough can last longer — up to 3 weeks. If your cough lasts longer than 3 weeks, or your symptoms get worse, see a GP.
Are chest infections contagious?
The viruses and bacteria that cause chest infections can spread through coughs and sneezes. Covering your mouth and nose, washing your hands, and throwing away used tissues helps prevent spread.
When are antibiotics needed for a chest infection?
Antibiotics do not help viral chest infections (like bronchitis) and are only prescribed if a GP thinks the infection is bacterial (like pneumonia). Most chest infections clear up without antibiotics.
What's the difference between a chest infection and pneumonia?
Pneumonia is a type of chest infection that affects the air sacs deep in the lungs. It tends to cause more severe symptoms — high fever, rapid breathing, and sharp chest pain. Pneumonia usually needs antibiotic treatment.
Can I go to work with a chest infection?
Rest helps your body recover. If you feel unwell, have a high temperature, or are coughing a lot, staying home helps you recover and reduces the risk of spreading infection to colleagues.
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This page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about your individual situation. NorMed organises publicly available NHS information and is not affiliated with the NHS.