Asthma symptoms

symptoms of asthma

 
Symptoms vary considerably. Some individuals stay relatively symptom free with occasional episodes of shortness of breath unless a trigger provokes an attack. Others cough and wheeze continually.

function test may be done, in which a device called a spirometer shows how much air can be blown out of the lungs after a deep breath and at what speed. Other tests, such as a bronchial challenge test or exercise tests, may also be done using a spirometer.

A series of allergy tests may reveal if known allergy- causing substances are responsible for the asthma, and other tests can rule out conditions with similar symp- toms, such as cystic fibrosis.