Asthma is a chronic lung condition. It is characterized by difficulty in breathing. People with asthma have extra sensitive or hyperresponsive airways. The airways react by narrowing or obstructing when they become irritated. This makes it difficult for the air to move in and out. This narrowing or obstruction can cause one or a combination of the following symptoms: wheezing, coughing,shortness of breath, chest tightness.This narrowing or obstruction is caused by: airway inflammation(meani...more