Asthma is a common inflammatory disease of the airways in the lungs. It makes your airways close up. Some of the symptoms are: coughing, wheezing, chest tightness, and breathing difficulties. Some people’s symptoms are worse at night or during exercise. These symptoms can occur at anytime, maybe a few times a day or a few times a week. Asthma can be caused by genetic and environmental factors. Some people have things that trigger an asthma attack. These things can be: Pollen, Pets, Mold, and Dust Mites.