Symptoms of asthma can be triggered by different situations depending on what type of asthma you have. The three most common types of asthma include allergy-induced asthma, occupational asthma, and exercise-induced asthma.   • Allergy-induced Asthma Allergy-induced asthma symptoms can occur after being exposed to certain allergens. Triggers such as pollen, mold spores, pet dander, and dust mites can make your immune system produce too much of an antibody called immunoglobulin E. High amounts of IgE will cause your airways to swell and, in turn, make you experience many asthma symptoms. • Occupational Asthma Occupational asthma happens when you are exposed to too many toxic irritants in the workplace. Whether your work environment has high levels of chemicals, fumes, animal fur, or dust, you should seek medical care if it has triggered worsened asthma symptoms. • Exercise-induced Asthma Exercise-induced bronchoconstriction, otherwise known as exercise-induced asthma, gets worse when you engage in physical activity. The lungs become triggered and cause wheezing, coughing, and difficulty breathing during strenuous activity.