What can cause sudden shortness of breath

On this page

• What are breathing problems?
• When should I call an ambulance or go to the emergency department?
• What should I do while waiting for an ambulance?
• What causes breathing problems?
• What other symptoms might I have?
• How are breathing problems treated?
• Can breathing problems be prevented?
• Related information on Australian websites

Breathing problems are one of the symptoms of COVID-19. Even if your symptoms are mild, get tested for COVID-19 immediately — use the breathing problems Symptom Checker if you're not sure what to do.

What are breathing problems?

Breathing problems are when you feel you can’t get enough air, your chest feels very tight, you are breathless or you feel like you’re being suffocated.

You might feel short of breath if you are obese or if you have just done some strenuous exercise. It can also happen in extreme temperatures or if you are at high altitude.

If you have breathing problems for any other reason, it is probably the sign of a medical problem.

When should I call an ambulance or go to the emergency department?

You should call triple zero (000) for an ambulance if:

• you are so short of breath you can’t speak in sentences
• you also have pains in your chest, arm or jaw
• you feel faint or sick

Make an appointment to see your doctor or consider going to an emergency department if, as well as being out of breath, you:

• have swollen feet or ankles
• feel more short of breath when you lie down
• have fever, chills and a cough
• have blue lips or fingertips
• make noises when you breathe
• have to put a lot of effort into breathing
• are getting worse

What should I do while waiting for an ambulance?

While you are waiting, try to stay calm. Sit upright and make sure you have someone with you if possible.

If you have asthma, take 4 puffs of your blue or grey reliever puffer. Take 4 more puffs every 4 minutes until help arrives.

What causes breathing problems?

Common causes of feeling short of breath are:

• lung problems, such as asthma and chronic obstructive pulmonary disease (COPD)
• heart problems, such as a cardiovascular disease and heart failure
• infections in the airways, such as croup, bronchitis, pneumonia, COVID-19, the flu and even a cold
• a panic attack or anxiety

Other causes of suddenly feeling short of breath are:

• allergic reactions
• lung collapse
• a blockage from a clot in one of the blood vessels in the lung (pulmonary embolism)
• rare lung conditions
• some infections, including COVID-19

Some people feel short of breath long term. This can be caused by:

• smoking
• being unfit
• being obese
• anaemia
• heart failure or other heart problems
• lung cancer

What other symptoms might I have?

If your breathing problems are caused by a cold or chest infection, you might also have a cough, fever, sore throat, sneezing, blocked or runny nose and general congestion.

If the problem is to do with your heart, you might also have chest pain, feel light-headed and nauseous. If you have been diagnosed with angina, take your medication as directed. Wait 5 minutes and take another dose.

If the problem is asthma or chronic obstructive pulmonary disease (COPD), you might also have a lot of mucous, a wheezing sound when you breathe, and your symptoms might get worse with exercise or during the night.

If the problem is a panic attack, you might also have a fast heartbeat, sweating and shaking, nausea, dizziness and a sense of impending doom or danger.

CHECK YOUR SYMPTOMS — Use the breathing problems Symptom Checker and find out if you need to seek medical help.

How are breathing problems treated?

The type of treatment you need depends on how unwell you feel, how suddenly it has come on and what other conditions you might have.

If you see a doctor, the tests you might have include:

• blood tests
• x-rays and scans
• breathing tests

Treatments include:

• help to quit smoking, if you smoke
• medicines, including tablets and puffers
• physiotherapy and exercises

Can breathing problems be prevented?

If you have any breathing problems, and you smoke you should quit. Call 13 78 48 or go to the Quitline website.

If you have any medication for breathing problems, such as puffers, use them as directed by your pharmacist or doctor. You can also:

• take care of yourself and any underlying cause of feeling short of breath
• stay calm and stand or sit up straight, which helps the air get in and out more easily
• avoid pollution
• avoid anything you are allergic to
• lose weight if you are overweight
• have a plan for what to do if things get worse

Why do I feel shortness of breath suddenly?

How do I know if my shortness of breath is serious?

What causes shortness of breath for no apparent reason?

How do you know if your shortness of breath is heart related?