What is asthma? Swelling and inflammation are a major part of the problem, but not the whole story. When the swelling of the airways increases, the lining of the airways becomes very sensitive and the tiny muscles that surround the airways begin to tighten. This is called “bronchospasm”. The inflammation may get worse slowly over time, slowly and imperceptibly. If no anti-inflammatory measures are taken, it can lead to bronchial obstruction or contracture, and may even be life-threatening due to breathing difficulties. Asthma symptoms include Coughing: usually occurs at night or in the morning Wheezing: a high-pitched whistling sound when you exhale Shortness of breath: feeling like there is not enough air and it is hard to breathe Chest tightness: feeling like something is pressing on your chest Breathing difficulties cause insomnia Inability to participate in physical activity You may have all or some of these symptoms. And not all people with asthma have shortness of breath; many people only have a cough. These symptoms come and go, and they are triggered by certain factors in the environment.