Do you feel shortness of breathing? Are you often wracked with coughing spells that occur only at night? Do you wheeze? Do you feel tightness in your chest? If you answered yes to all of the above, you might be suffering from asthma. According to the American Academy of Allergy, Asthma, and Immunology, four out of five Americans have asthma. In the U.S alone, asthma ranks as one of the top ten causes for hospitalization. Asthma is triggered by many things, most common of which is allergen. There are other triggers, too, such as perfume, emotional stress, pet dander, fatigue, and tobacco smoke. The articles in this section are all about asthma.