How to confirm the diagnosis of Asthma- Meet your chest physician (Pulmonologist). Asthma is usually suspected with history and clinical examination and confirmed with spirometry, which documents variable airflow limitation. What is treatment of asthma- Treatment of asthma is simple and easy. Once diagnosed with asthma, doctors usually prescribe inhalers. Most commonly prescribed inhalers have two medications. One component provides rapid symptomatic relief while other controls the inflammation in airways. These inhalers are very effective in controlling asthma and given for all severity of asthma