Asthma

Asthma is a condition in which your airways narrow and swell and may produce extra mucus. This can make breathing difficult and trigger coughing, a whistling sound (wheezing) when you breathe out, and shortness of breath. For some people, asthma is a minor nuisance. allergies – such as to pollen, dust mites, animal fur, or feathers. smoke, fumes, and pollution. medicines – particularly anti-inflammatory painkillers like ibuprofen and aspirin. emotions, including stress, or laughter.