The cell membranes of the mast cells and nearby tissue cells give off arachidonic acid, which interacts with enzymes and produces additional chemicals called prostaglandins and leukotrienes. The leukotrienes have been identified by researchers as substances 5,000 to 10,000 times more powerful than histamine in causing inflammation and airway obstruction. Types of Allergic Disease These allergic reactions can result in allergic rhinitis, with the usual accompanying respiratory discomfort caused by inhaling allergens in the form of weed, tree and grass pollen, mold spores, house dust, and animal dander. Asthma, a far more serious disease, results in wheezing and shortness of breath due to a narrowing of the bronchial tubes. Asthma is caused by a sensitivity to certain allergens like pollen, mold spores, house dust mites, and may be irritated or aggravated by respiratory tract infections.
Emotional stress can also trigger attacks.
However, stress is really only a secondary factor of a disease that is primarily allergic in nature. Another disease affecting the lungs is called hypersensitivity pneumonitis. Symptoms include fever, wheezing, chills and shortness of breath. The condition is caused by exposure to various organic dusts, such as bird droppings, contaminated grain and feathers. Hives also can be brought on by changes in temperature.