Asthma is a lung condition that affects people of all ages. Asthma is one of the most frequent chronic disorders in children, but it can also affect adults. Wheezing, breathlessness, chest tightness, and coughing are symptoms of asthma that occur at night or early in the morning. If you have asthma, you have it all of the time, but asthma attacks only happen when your lungs are bothered.