Get the facts on Chronic Asthma with this 100%-accurate animated video. Part of Focus Apps' Understanding Disease: Respiratory Disease series, the Chronic Asthma app demonstrates how the airways can become inflamed and hyper-responsive, causing episodes of breathing difficulty. Fully understand asthma, inflammation of nasal membranes, sneezing, nasal congestion, and itching. Explore causes, signs, symptoms, and treatment options.