If you have an allergic disease, your body identifies some substances, called allergens, as harmful. These substances, which are harmless to most people, trigger allergic reactions within your immune system.
Asthma is a common lung disorder characterized by episodes of coughing, wheezing and shortness of breath. It is caused by inflammation of the lining of the small airways in the lungs, called bronchioles, which leads to spasm or narrowing of these tubes. This spasm triggers asthma symptoms.
Identifying certain triggers that cause your allergy and asthma symptoms can help bring comfort and peace of mind. If you are not able to avoid known triggers, the symptoms can decrease your quality of life, including work and school productivity, sleep, concentration and enjoyment of outdoor activities.
Learn about these common triggers, and the signs and symptoms of allergy and asthma: