History, physical +
Your physician should talk to you and your child about her/his symptoms, examine your child, and may (based on this) order pulmonary function tests if your child is older than 5 and1/2.
These tests evaluate for blockage (obstruction) in the airway caused by inflammation
; however, a negative test does not mean that asthma
is absent and a positive test doesn't mean they have asthma.