If there is a suspicion of having bronchial asthma, a series of tests will be carried out at the hospital, mainly including:

First, complete blood count, especially focusing on whether there is an increase in eosinophils, to determine the presence of eosinophilic allergic inflammation.

Second, imaging of the lungs, including chest X-ray or CT to determine whether there are any specific lesions in the lungs.

Third, pulmonary ventilation function and bronchodilation tests, or bronchial provocation tests. Pulmonary function is a gold standard for diagnosing bronchial asthma, often indicating the presence of obstructive ventilation dysfunction. A positive bronchodilation test or provocation test can help in confirming bronchial asthma.