It is a common disease which affects the branches of the trachea and bronchi. This problem is called asthma. There are different types of asthma, but this article focuses on the type, which is due to allergens and burns. According to statistics, the American Academy of Allergy, Asthma and Immunology, half of asthma cases, the United States is allergic asthma. This shows that among the allergens causing asthma day of sport in the world, as more and more people suffer from conditions preventable.When an asthma attack, the victim's great difficulty in breathing.