Asthma: symptoms, inhalers and how to keep it controlled

In short

• Control medicines taken daily calm airway inflammation; quick-relief medicines only open the airways for a while.
• Needing your reliever more often than usual, or waking at night with symptoms, means your asthma needs a review.
• A written asthma action plan from your provider tells you what to do on good days, worse days and emergencies.
• A spacer helps the medicine reach your lungs, and your provider can check your inhaler technique.
• Symptoms that keep coming back, even if they settle between episodes, deserve a visit rather than another puff of reliever.

What asthma is

In asthma, inflammation and muscle tightening around the airways make breathing harder. WHO estimates 363 million people had asthma in 2023, and calls it the most common chronic disease among children. It often starts in childhood but affects people of all ages.

The exact cause is unknown; genes and environment likely both play a part. A sudden, significant worsening is called an asthma attack, and attacks can be life-threatening.

Symptoms and signs of poor control

• Wheezing, a whistling sound when you breathe out.
• Coughing, especially at night or early in the morning.
• Shortness of breath.
• Chest tightness.

These symptoms come and go and are often worse at night or with exercise. Your asthma may be slipping if symptoms happen more often or feel worse than usual, you need your reliever more often, you wake at night, or you have trouble with usual activities including exercise.

Two kinds of medicine

1. Long-term control.Taken daily to reduce airway inflammation and prevent symptoms. The classic form is an inhaled corticosteroid; other options include combination inhalers, leukotriene modifiers and, for hard-to-control asthma, biologic medicines.
2. Quick relief.Works fast to open the airways during symptoms or an attack, for example inhaled short-acting bronchodilators. Carry one at all times.
3. Combination inhalers.Some contain a bronchodilator and a steroid together, and some are designed for both daily use and symptom relief. The NHS notes that a plain blue reliever should never be used alone.

Steroid inhalers deliver medicine straight to the lungs. WHO notes they reduce airway inflammation and lower the risk of severe attacks, so a worry about steroids is worth raising with your provider rather than quietly skipping doses.

Your asthma action plan

An action plan is a written plan from your provider. It covers how to avoid triggers, how to recognize and respond to an attack, which medicines to take and when, and when to call a provider or go to the emergency room. Bring it to all of your appointments.

Most asthma care also includes at least one check-up a year, when your treatment and inhaler technique are reviewed. Ask your provider to watch you use your inhaler, and ask about a spacer, a chamber that helps medicine reach the lungs.

Who is more likely to have asthma

Risk factors include secondhand smoke before birth or in early childhood, workplace irritants such as chemicals or industrial dusts, a family history of asthma, obesity, allergies, and frequent viral respiratory infections in young children. Asthma is more common in boys during childhood and in women during the teen and adult years.

Having risk factors does not mean you will develop asthma, and some people with asthma have none of them. If breathing symptoms keep returning, the pattern matters more than the label you give them.

Triggers and what to do about them

• Colds, flu and other respiratory infections.
• Allergens such as pollen, dust mites, mold, pets and pest waste.
• Tobacco smoke, including secondhand smoke.
• Cold air and exercise.
• Strong smells, household chemicals and air pollution, including wildfire smoke.
• Acid reflux, and certain medicines or foods in people who are allergic to them.

Triggers vary from person to person. Practical steps include keeping smoke out of your home and car, using allergen-proof mattress and pillow covers, washing bedding weekly, fixing leaks to limit mold, and checking air quality forecasts. Exercise does not have to be off the table: symptoms that appear regularly during activity are a sign to review treatment.

What to do during an attack

1. Sit up and stay calm.Do not lie down.
2. Use your quick-relief inhaler.Follow your action plan, with a spacer if you have one.
3. Call for help if it is not improving.If you feel worse at any time, do not improve after the amount your plan allows, or do not have your inhaler, call 911.
4. Do not drive yourself.Wait for the ambulance.

After any attack, even if you feel fully recovered, see your provider within two days.

When to see a doctor

Book a visit if you are getting symptoms, treatment is not helping, you need your inhaler more often, symptoms disrupt daily activities or wake you at night, or you do not have a written action plan. Bring every inhaler you use, because your provider can often judge control from how quickly you use them up.

Red flags, call 911: you cannot speak in full sentences, your quick-relief medicine is not helping or does not last, your lips turn blue, you feel confused or very drowsy, or your breathing is very fast.

How asthma is confirmed

A clinician asks about your symptoms and listens to your chest. Tests may include a breathing test, sometimes a blood test, and a peak flow meter that you use at home for a few weeks. Because symptoms vary, diagnosis can take time, and you may be offered medicines to see whether they help.

Other conditions can cause similar symptoms, which is one reason to get a proper assessment rather than relying on a reliever inhaler alone.

Questions and answers

Sources

1. WHO — Asthma fact sheet
2. NHLBI — Asthma
3. NHLBI — Asthma treatment and action plan
4. NHS — Asthma
5. CDC — Controlling Asthma Triggers
6. MedlinePlus — Asthma

Sources checked on 29 October 2026.