I just went to an allergist who did scratch tests and said I have allergies to dust mites, dogs, some pines, some grasses etc. I mentioned the chest problems and she gave me a peak flow meter to test myself for a month.
Airflow obstruction is at least partially reversible.
Alternative diagnoses are excluded. A peak flow meter can be used to establish episodic airflow obstruction. A peak flow meter can also be used to demonstrate that airflow obstruction is at least partially reversible. However, spirometry is the best method to demonstrate airways reversibility. The NIH recommends that every patient with asthma should be evaluated with spirometry and that this test should be performed periodically.