There is no single test for asthma. Your doctor will decide if you have asthma based on talking to you, examining you and performing some breathing tests.
They will evaluate:
- What your symptoms are, how frequently these occur, and whether you notice any improvement with medicine (if you are using anti-asthma treatment)
- Your medical history
- Your family history
- Whether you have allergies
- What things or situations cause you to have symptoms (your triggers)
- Your lung function (possibly using breathing tests like spirometry or peak flow monitoring)
To assess how well your lungs work, a breathing test called 'spirometry' is carried out. You will be asked to breathe into a machine called a 'spirometer', which measures the amount of air you can breathe out as well as your lung capacity and other measurements.