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Spirometry is a simple breathing test that measures how well your lungs work. You blow into a mouthpiece connected to a machine, and it records how much air you can breathe out and how fast. It helps doctors check for lung problems like asthma or chronic obstructive pulmonary disease (COPD).
Key facts
Spirometry is a very common test used worldwide to diagnose and monitor lung conditions. Millions of people have it each year.
Anyone with symptoms such as long-term cough, wheeze, shortness of breath, or a family history of lung problems may need spirometry. It is also used to check lung function in people with asthma or COPD.
Your doctor will first ask about your symptoms, medical history, and any exposures. They will listen to your lungs with a stethoscope. If they suspect a lung condition, they will refer you for spirometry.
Before the test, you may be asked to avoid smoking, heavy meals, and some medicines for a few hours. On the day, you will sit upright, wear a nose clip, and take a deep breath. Then you blow into the mouthpiece as hard and fast as you can for at least 6 seconds. The test is repeated at least 3 times to get the best result. It is not painful, but you might feel a little breathless or dizzy for a moment.
Spirometry itself is a diagnostic test, not a treatment. However, it helps guide treatment for the lung conditions it detects. Depending on the diagnosis, your doctor may recommend medicines to open your airways, reduce inflammation, or treat infections. Other treatments include pulmonary rehabilitation (exercise and education), oxygen therapy, or lifestyle changes.
Treatment may include inhaled bronchodilators (medicines that widen the airways) and inhaled corticosteroids (medicines that reduce airway inflammation). These are usually given through inhalers or nebulizers. For infections, antibiotics may be prescribed. Your doctor will create a plan tailored to your specific condition.
Having regular spirometry tests helps you and your doctor track how your lungs are working over time. You can lead a full life by managing your condition with medication, avoiding triggers, and staying active.
A balanced diet rich in fruits, vegetables, and whole grains supports overall health. Regular moderate exercise like walking or swimming can improve your breathing and stamina. Always check with your doctor before starting a new exercise routine.
Some lung conditions like asthma or COPD may not be completely preventable, but you can reduce your risk by not smoking, avoiding lung irritants, and getting vaccinated. Early detection through spirometry helps manage conditions before they worsen.
Annual flu vaccination and pneumonia vaccines are recommended to prevent lung infections that can make breathing problems worse. Ask your doctor or local pharmacy about which vaccines you need.
Spirometry is sometimes used as a screening test for people at high risk of lung disease (e.g., smokers over age 40). Talk to your doctor if you think you might benefit from screening.
For most people, lung conditions found early can be managed well with medication and lifestyle changes. Spirometry helps keep your lungs under control. With good care, you can maintain an active, good quality of life for many years.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 9, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Surgery is rarely needed for lung conditions diagnosed by spirometry. In severe, advanced COPD or certain lung diseases, procedures like lung volume reduction surgery or lung transplant may be considered after thorough assessment.
Living with a long-term lung condition can cause anxiety, stress, or low mood. It is normal to feel worried about breathlessness. Talking to a counsellor or joining a support group can help. If you feel overwhelmed, reach out to your doctor or a mental health professional.