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How do I know If I have asthma?

A peak flow meter with a white mouth tube and yellow measurement scale
A Peak Flow meter.

The commonest ways young people find out they have asthma are

  • having a persistent cough at night
  • getting wheezy and short of breathe after exercising

Your doctor can check out your lungs using an instrument called a 'Peak Flow meter', which involves blowing into a tube and measuring the speed of the air whizzing out and out of it.


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