Asthma is a chronic lung disease, characterized by recurrent breathing problems caused by airway inflammation.
Asthmatics always have sensitive, and swollen or inflamed airways, even when there are no symptoms.
Mucus clogs the airways. These changes narrow the airways until breathing becomes difficult and stressful, resulting in asthma symptoms. Allergens , substances that cause allergic reaction, which can include dust mites, pollens, molds, pet dander, cockroaches and their waste. Irritants in the air, including smoke from tobacco, wood fires or charcoal grills, as well as other strong fumes or odors, including household sprays, paint, gasoline, perfume and scented soaps. Respiratory infections , such as colds, flu, sore throats and sinus infections.