Understanding Asthma Asthma is a disease that affects how you breathe. When you have asthma, it can be difficult to get air in and out of your lungs. Pulmonary Tests & Procedures Spirometers, peak flow meters, and oximetry are just some of the tools available to help assess and manage your asthma. Controlling Asthma Triggers Pollen, dust and smoke are common triggers for asthma. To control your asthma, must learn which triggers you are sensitive to. Managing Your Asthma To keep your asthma under control, it's important to work with your health care provider to develop a daily treatment plan. Asthma and Other Conditions People with asthma are more likely to develop other health problems, including allergies, chronic cough and bronchitis. For Kids Only You can learn how to help control your asthma. One way is to learn about the things that make you have flare-ups.