Asthma is a chronic respiratory condition that may affects the airways, causing inflammation, constriction, and mucus production. Having asthma can be very difficult, but with the proper treatment, you can control your condition and breathe easily. One of the best ways you can control your asthma is by using an inhaler e.g., Metered-Dose Inhalers (MDIs), Dry Powder Inhalers (DPIs).