Asthma is a chronic lung disease. It cannot be cured - only controlled. Airways are inflamed. That is, airway linings are swollen. Airways narrow and breathing becomes hard to do.
Airways are super sensitive.
They react to many things, such as cigarette smoke, pollen cold air. Coughing, wheezing, tight chest, difficult breathing, or an asthma episode may result. Not all people with asthma wheeze. For some, coughing may be the only symptom of asthma. Coughing often occurs during the night or after exercise.