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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.

The symptoms may sometimes flare up.
Asthma can usually be managed with rescue inhalers to treat symptoms and controller inhalers that prevent symptoms. Severe cases may require longer-acting inhalers that keep the airways open, as well as oral steroids.