Asthma involves hyper-responsiveness of the airways, which become inflamed and constricted in response to triggers like allergens, cold air, stress, or physical exertion. This leads to symptoms such as shortness of breath, wheezing, chest tightness, and coughing. Herbal remedies like mullein (Verbascum thapsus) and licorice root (Glycyrrhiza glabra) are traditionally used to reduce airway inflammation and soothe irritated mucous membranes. Butterbur (Petasites hybridus) is known for its ability to relax smooth muscles and reduce bronchial inflammation. Lobelia (Lobelia inflata), in small, controlled doses, is also used to relax the respiratory muscles and ease bronchospasms.

Lifestyle modifications, such as avoiding known triggers, maintaining good air quality, and practicing breathing exercises, can also help manage asthma symptoms and improve overall respiratory health.