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Asthma is a long-term (chronic) inflammatory lung condition that makes the airways swell, tighten, and produce extra mucus, making it hard to breathe.Key Features of AsthmaInflammation: The breathing tubes that carry air in and out of the lungs stay irritated and swollen.Triggers: Everyday things like pollen, exercise, cold air, smoke, or viral infections can set off a flare-up.Airway Narrowing: During an attack, muscles around the airways tighten (bronchospasm) and mucus blocks the passage.Common SymptomsWheezing when breathing outShortness of breath or chest tightnessCoughing, especially at night or during exercise