Asthma is a chronic respiratory condition where airways become inflamed and narrowed, making breathing difficult. During asthma attacks, airways swell, produce extra mucus, and surrounding muscles tighten, causing symptoms like wheezing, coughing, chest tightness, and shortness of breath. Triggers vary but commonly include allergens (pollen, dust, pet dander), respiratory infections, cold air, exercise, and air pollution. Asthma affects approximately three million Canadians and is one of the most common chronic childhood diseases. Treatment involves avoiding triggers and using medications—typically quick-relief inhalers for attacks and controller medications for ongoing management. With proper treatment, most people with asthma can lead active lives.