Asthma is an alllergy that caused the airways of the lungs to swell and narrow
Overview
What happens during an asthma attack
Asthma attack
Asthma is a condition in which your airways narrow and swell and produce extra mucus. This can make breathing difficult and trigger coughing, wheezing and shortness of breath.
For some people, asthma is a minor nuisance. For others, it can be a major problem that interferes with daily activities and may lead to a life-threatening asthma attack.
Asthma can't be cured, but its symptoms can be controlled. Because asthma often changes over time, it's important that you work with your doctor to track your signs and symptoms and adjust treatment as needed.
Symptoms
Asthma symptoms vary from person to person. You may have infrequent asthma attacks, have symptoms only at certain times — such as when exercising — or have symptoms all the time.
Asthma signs and symptoms include:
Shortness of breath
Chest tightness or pain
Trouble sleeping caused by shortness of breath, coughing or wheezing
A whistling or wheezing sound when exhaling (wheezing is a common sign of asthma in children)
Coughing or wheezing attacks that are worsened by a respiratory virus, such as a cold or the flu
Signs that your asthma is probably worsening include:
Asthma signs and symptoms that are more frequent and bothersome
Increasing difficulty breathing (measurable with a peak flow meter, a device used to check how well your lungs are working)
The need to use a quick-relief inhaler more often
For some people, asthma signs and symptoms flare up in certain situations:
Exercise-induced asthma, which may be worse when the air is cold and dry
Occupational asthma, triggered by workplace irritants such as chemical fumes, gases or dust
Allergy-induced asthma, triggered by airborne substances, such as pollen, mold spores, cockroach waste or particles of skin and dried saliva shed by pets (pet dander)
When to see a doctor
Seek emergency treatment
Severe asthma attacks can be life-threatening. Work with your doctor to determine what to do when your signs and symptoms worsen — and when you need emergency treatment. Signs of an asthma emergency include:
Rapid worsening of shortness of breath or wheezing
No improvement even after using a quick-relief inhaler, such as albuterol
Shortness of breath when you are doing minimal physical activity