What is dyspnea (shortness of breath): symptoms, causes, and treatment

Key takeaways

1. Shortness of breath (dyspnoea) can develop gradually or suddenly, and may relate to the heart, lungs, circulation, or other medical conditions. Paying attention to when the symptoms occur helps guide assessment.
   
2. Breathlessness feels different for everyone, ranging from chest tightness to difficulty taking a full breath, and should be reviewed if it is new, persistent, or worsening.
   
3. Common causes include asthma, COPD, infections, allergies, anxiety, anaemia, and a range of heart conditions such as heart failure or rhythm disturbances.
   
4. Diagnosis often requires several tests, including ECG, echocardiography, stress echocardiography, Holter monitoring, blood tests, and clinical examination to identify the underlying cause.
   
5. Shortness of breath accompanied by chest pain, blue lips, dizziness, or sudden onset requires urgent care; ongoing or unexplained symptoms should be assessed in a clinical setting.

Have you ever suddenly felt short of breath and wondered whether it was just exertion or a sign of something more? Shortness of breath, known medically as dyspnoea, can develop slowly or appear without warning.

Dyspnoea can relate to the lungs, heart, circulation or other medical conditions, and paying attention to when symptoms occur is an important part of assessment. If breathlessness is new, persistent, or worsening, it should be reviewed to identify the underlying cause.

What are the symptoms of shortness of breath?

Shortness of breath can feel different from person to person. Some describe it as a struggle to draw in a full breath. Others feel pressure or heaviness across the chest. Many people explain it as a sense of needing more air, even while breathing faster or deeper than usual.

Common symptoms include:

• Difficulty breathing or feeling unable to “catch your breath”
• Rapid or shallow breathing
• Tightness in the chest
• Wheezing or a whistling sound when breathing
• Feeling out of breath during light activity
• Breathing faster than normal at rest
• A need to take deeper breaths than usual
• Dizziness or light-headedness
• Blue or grey lips or skin (a medical emergency)
  

 

If you’re unsure what shortness of breath feels like, think about whether breathing is harder than usual or if it changes how easily you can move, talk or rest.

Shortness of breath may also occur with:

• Chest pain
• A persistent cough
• Fatigue or weakness
• Rapid heartbeat (tachycardia)
• Anxiety or a sense of panic

 

Any combination of these symptoms should prompt medical review, especially if they appear suddenly or worsen over time.

What are the common causes of shortness of breath?

Shortness of breath, or dyspnoea, has many potential causes. Some are mild or temporary; others require investigation to rule out a serious condition.

Here are the most common causes of dyspnoea:

1. Physical exertion

Feeling winded during exercise is normal. However, breathlessness after light activity or simple daily tasks may indicate an underlying condition.

2. Asthma

Asthma causes inflammation and narrowing of the airways, leading to breathlessness, wheezing, and coughing.

3. Chronic obstructive pulmonary disease (COPD)

COPD includes conditions such as chronic bronchitis and emphysema. Both make breathing more difficult and often cause ongoing breathlessness.

4. Allergies

Allergic reactions can lead to airway inflammation, triggering shortness of breath.

5. Anxiety

Anxiety and panic can cause rapid breathing, chest tightness, and breathlessness. While these episodes may pass, they should still be assessed if they are frequent or severe.

6. Heart conditions

Many cardiac conditions can affect breathing, including:

• Heart failure
• Arrhythmias
• Valve problems
• Changes in heart function

These may be especially relevant when symptoms include shortness of breath and heart pain or breathlessness during rest or sleep.

7. Pulmonary embolism

A blood clot in the lungs causes sudden, severe breathlessness and chest pain. This is a medical emergency.

8. Pneumonia

Infection of the lungs leads to inflammation, fever, coughing and breathlessness. Symptoms may intensify when walking or exerting yourself, making prompt medical review necessary.

9. Shortness of breath that comes and goes

Intermittent breathlessness can occur with arrhythmias, anxiety, asthma, anaemia, or fluid retention related to the heart. Even if symptoms ease, they should not be ignored.

What are risk factors for shortness of breath?

Certain factors increase the likelihood of developing breathing difficulties:

• Increasing age
• Smoking or exposure to tobacco smoke
• Excess body weight
• Low physical fitness
• Chronic heart or lung conditions
• Allergies
• Anxiety or panic disorders 

Recognising these risk factors can help guide early assessment and intervention.

How is shortness of breath diagnosed?

Shortness of breath requires a detailed assessment to determine its cause. At HeartWest, clinicians may use the following:

1. Clinical examination

One of our cardiologists will review your symptoms and medical history and perform a physical examination.

2. Electrocardiogram (ECG)

This records the heart’s electrical activity and can detect arrhythmias and other changes affecting breathing.

3. Echocardiogram 

An ultrasound of the heart that assesses structure and function, often used to identify heart failure or valve issues.

4. Stress echocardiogram

This evaluates heart performance under physical stress and helps detect conditions that are not visible during resting tests.

5. Holter monitor 

A portable device worn for 24–48 hours (or longer) to assess heart rhythm changes that may contribute to breathlessness.

6. Blood tests

These can check for anaemia, thyroid issues, infection, or other metabolic factors affecting breathing.

Together, these tests can help provide a clear picture of whether shortness of breath is related to the heart, lungs, circulation, or another cause.

How is shortness of breath treated?

Treatment depends entirely on the underlying cause. Once the reason for breathlessness is identified, your cardiologist or healthcare provider may recommend:

• Medication for heart failure, high blood pressure, or arrhythmias
• Management plans for asthma or COPD
• Addressing infections such as pneumonia
• Adjusting lifestyle factors (smoking cessation, weight support, activity levels)
• Managing anxiety-related episodes through your GP or mental health provider
• Monitoring and follow-up care if symptoms evolve 

Our cardiologists will work with you to guide treatment based on your test results and overall health needs.

When to seek medical attention for shortness of breath

Seek help if you experience:

• Severe or sudden shortness of breath
• Shortness of breath and heart pain
• Blue lips or skin
• Fainting or near-fainting
• Difficulty breathing at rest
• Breathlessness accompanied by dizziness or chest tightness 

Call 000 in an emergency. 

For ongoing, worsening, or unexplained symptoms, a clinical assessment at HeartWest is advised.

Where can I go if I am experiencing shortness of breath?

We provide comprehensive cardiac assessment across multiple Melbourne locations. You will have access to:

• General cardiology
• Heart failure management
• Cardiac imaging, including echocardiography and stress echocardiography
• Interventional cardiology
• Electrophysiology and pacing
• ECG and Holter monitoring 

Shortness of breath should be assessed when it is new, persistent or unexplained. Some causes are mild, while others relate to heart or lung conditions that benefit from early review.

To book a cardiac review or discuss your concerns, contact us. Our team can arrange ECGs, echocardiograms, stress testing, Holter monitoring and a consultation with a cardiologist.

FAQs

1. What does shortness of breath feel like, and when should I seek care?

It may feel like effortful breathing, tightness, or not getting enough air. Seek medical review if symptoms occur at rest, are unexplained, or worsen. Noting when symptoms begin and what triggers them can help your clinician more accurately determine the underlying cause.

2. Can a heart condition cause shortness of breath that comes and goes?

Yes. Arrhythmias, circulation issues, and early heart failure can cause intermittent breathlessness. These episodes may also occur during rest or mild activity, making ongoing monitoring important if symptoms persist.

3. What tests help diagnose the causes of dyspnoea?

ECG, echocardiography, stress echocardiography, Holter monitoring, and blood tests are commonly used to assess shortness of breath. Choosing the right combination of tests helps thoroughly evaluate both structural and rhythm-related causes of breathlessness.

4. Is shortness of breath and heart pain a medical emergency?

Yes. This combination may indicate a serious heart or lung problem. Call 000 immediately. Urgent care is critical if symptoms begin suddenly or are accompanied by dizziness, sweating, or nausea.

5. How does HeartWest assess ongoing or unexplained breathing difficulties?

Through clinical consultation, ECG, echocardiography, stress testing, Holter monitoring and tailored follow-up. This step-by-step approach helps identify whether symptoms are caused by heart rhythm changes, reduced heart function, or other medical conditions.