Asthma is a chronic lung condition marked by inflammation and narrowing of the airways, leading to symptoms such as wheezing, coughing, chest tightness, and shortness of breath. These symptoms can vary in intensity and are often triggered by allergens, cold air, physical activity, or respiratory infections. Asthma may have genetic roots, but environmental factors like pollution, allergens, and stress also contribute to its development. There are different forms of asthma, including allergic asthma , eosinophilic asthma (a severe type linked to high eosinophil levels), and cough variant asthma, where a persistent dry cough is the main symptom. See More  symptoms of asthma