IAN HOOTON / SCIENCE PHOTO LIBRARY IAN HOOTON / SCIENCE PHOTO LIBRARY
Asthma inhaler use. Man using an inhaler to treat an asthma attack. Asthma is a condition in which the small airways (bronchioles) in the lungs constrict, making it difficult to breathe. This causes wheezing, coughing and breathlessness. The inhaler contains bronchodilator drugs, which widen the airways.
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