Causes of Asthma
Researchers have been unable to pin point the exact cause for asthma. They believe that asthma results out of a combination of factors, including heredity and specific environmental factors which interact to cause this illness. Some of the factors which contribute to development of asthma include:
• Atopy, or a hereditary tendency to develop various kinds of allergies.
• Respiratory tract infections that were developed in childhood
• Exposure to certain viral infections in childhood when the body’s immunity was developing or contact with airborne allergens dog dander, house dust mites.
• Exposure to tobacco smoke can also constrict the airways and make them more reactive.