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Asthma is a common condition that affects your breathing by preventing air from flowing freely into and out of your lungs. It is a chronic or long-term disease in which the air passages or bronchial tubes in the lungs become inflamed or swollen. Breathing is difficult when your airways are swollen and narrowed. But, with proper management as directed by your doctor/healthcare provider, people with asthma can lead full and active lives.

When you breathe, you take air in through your nose and mouth. The air passes through your throat and trachea (windpipe) and goes into your lungs. Your lungs are made up of tubes called bronchial tubes that branch out like a tree. Bands of muscle cover your bronchial tubes. The lining of the bronchial tubes produces a sticky substance called mucus that helps your lungs get rid of particles that you breathe in. At the end of each tube there are tiny sacs, called alveoli, that exchange air.

When you have asthma, your airways are red, swollen, and easily irritated. This irritation, or inflammation, gets worse in reaction to things called "triggers," such as colds, allergies, cigarette smoke, and changes in the weather. Triggers irritate your lungs even more, causing your symptoms to get worse.

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