Shortness of breath: causes, symptoms, warning signs and treatment

Shortness of breath can be unsettling. You may feel that you cannot take a deep enough breath, that your chest is tight, or that you are working harder than usual just to breathe. The medical term for this feeling is dyspnea.

Sometimes breathlessness is a normal response to strenuous exercise, extreme temperatures, high altitude or being physically unfit. However, shortness of breath can also be an early sign of asthma, a chest infection, anaemia, heart disease, chronic lung disease or other medical conditions.

The important question is not simply, “How do I stop feeling breathless?” It is why are you becoming breathless in the first place?

This guide explains the common causes of shortness of breath, warning signs that need medical attention, how doctors investigate it, what you can do to ease breathing and when breathlessness may be related to the heart.

What is shortness of breath?

Shortness of breath is the uncomfortable sensation of not getting enough air or having to work harder to breathe. Some people describe it as:

• Feeling unable to take a full breath
• Tightness in the chest
• Feeling “air hungry”
• Gasping or breathing faster than usual
• Feeling winded after relatively little activity
• Needing to consciously control your breathing
• Feeling breathless even while sitting or lying down

Shortness of breath can develop suddenly over minutes or hours, or it can gradually become noticeable over weeks or months. Acute breathlessness generally develops quickly, whereas chronic breathlessness persists for several weeks or keeps returning.

Why am I having difficulty breathing?

There is no single cause of breathing difficulty. Your lungs bring oxygen into your body, while your heart circulates oxygen-rich blood to your tissues. Problems affecting either system can therefore cause breathlessness.

Common possibilities include:

• Asthma or allergies
• Chest infections such as pneumonia or bronchitis
• COPD
• Heart failure or other heart conditions
• Anaemia
• Anxiety or panic attacks
• Smoking
• Poor physical fitness
• Obesity
• Pulmonary embolism
• Certain medications
• High altitude

Sometimes several factors occur together. For example, someone with asthma may become more breathless during an anxiety episode, while a person with anaemia may become unusually breathless during exercise.

What are the 10 causes of shortness of breath?

There are many possible causes, but these 10 are particularly important to understand:

1. Asthma

Asthma causes narrowing and inflammation of the airways. Breathlessness may occur along with wheezing, coughing or chest tightness.

2. Respiratory infections

Colds, influenza, COVID-19, bronchitis and pneumonia can make breathing difficult, particularly when accompanied by fever, cough or mucus.

3. COPD

Chronic obstructive pulmonary disease can cause persistent breathlessness, cough and reduced exercise tolerance. Smoking is an important risk factor.

4. Heart disease

Heart failure and other cardiovascular conditions can reduce the heart’s ability to deliver blood effectively, causing breathlessness, particularly during activity or sometimes while lying down.

5. Anaemia

When there are too few healthy red blood cells to carry oxygen efficiently, you may experience fatigue, weakness and breathlessness, particularly during exertion.

6. Anxiety and panic attacks

Anxiety can produce rapid breathing and the sensation that you cannot get enough air. It may also be accompanied by a racing heart, sweating, shaking or dizziness.

7. Pulmonary embolism

A blood clot that travels to the lungs can cause sudden shortness of breath. It may occur with chest pain, a rapid heartbeat or coughing up blood and requires urgent medical assessment.

8. Allergic reactions

A significant allergic reaction can cause swelling or narrowing of the airways and severe breathing difficulty.

9. Poor fitness or obesity

Strenuous activity can make anyone temporarily breathless. People who are less physically active may also become breathless with everyday exertion.

10. Other lung conditions

Interstitial lung disease, pulmonary hypertension, lung cancer, pleural disease and other respiratory conditions can cause persistent or progressive breathlessness.

What are the early warning signs of shortness of breath?

Early breathing problems are not always dramatic. You may initially notice that:

• You become breathless climbing stairs that previously felt easy.
• You need to stop more often while walking.
• You breathe faster during ordinary activities.
• You feel unable to take a satisfying deep breath.
• You develop wheezing or persistent coughing.
• You become unusually tired during physical activity.
• You need more pillows to sleep comfortably because lying down makes breathing harder.
• Breathlessness is becoming more frequent or severe.

A gradual reduction in exercise tolerance can be just as important as sudden breathlessness. If you are becoming short of breath with less effort than before, it is worth discussing with a healthcare professional.

What are the first signs of breathing problems?

The first signs depend on the underlying condition. A persistent cough, wheezing, unusual fatigue, reduced exercise tolerance, faster breathing or breathlessness during normal activities may indicate a respiratory problem.

Do not assume that breathlessness is simply due to getting older. The American Lung Association notes that ageing itself does not cause shortness of breath, although the likelihood of conditions that cause breathlessness can increase with age.

How to tell if your shortness of breath is serious?

Seek emergency medical attention if shortness of breath is severe or develops suddenly, particularly if it occurs with:

• Chest pain, pressure or heaviness
• Fainting or severe dizziness
• Blue, grey or unusually pale lips or skin
• Confusion or a change in alertness
• Inability to speak normally because you are struggling to breathe
• A very fast or irregular heartbeat
• Coughing up blood
• Sudden breathlessness after prolonged travel, surgery, illness or immobilisation

These symptoms can occur with serious conditions such as a heart attack or pulmonary embolism.

If breathlessness is getting progressively worse, occurs with swollen ankles, becomes worse when lying down, or is accompanied by persistent cough or wheezing, arrange a medical evaluation rather than trying to manage it yourself.

How do I know if my shortness of breath is heart-related?

Breathlessness can sometimes be a symptom of heart disease, particularly when it has a characteristic pattern.

Heart-related breathlessness may:

• Occur during walking, climbing stairs or other exertion
• Gradually worsen over time
• Occur when lying flat
• Wake you suddenly at night
• Occur along with swelling of the ankles or legs
• Be accompanied by unusual fatigue or weakness
• Occur with palpitations or chest discomfort

Heart failure, for example, commonly causes breathlessness during activity and can sometimes cause breathlessness at rest or suddenly during sleep.

However, symptoms alone cannot reliably distinguish a heart problem from a lung problem. An ECG, echocardiogram, blood tests and other investigations may be needed.

What are the first signs of a weak heart?

The phrase “weak heart” is commonly used to describe reduced heart pumping function, but it is not a specific diagnosis.

Possible warning signs of heart failure include:

• Breathlessness during everyday activities
• Breathlessness when lying down
• Waking at night struggling to breathe
• Persistent cough or wheezing
• Swelling of the feet, ankles or legs
• Unusual fatigue
• Reduced ability to exercise
• Rapid or irregular heartbeat
• Sudden changes in weight due to fluid retention

The American Heart Association recommends medical evaluation when symptoms suggest possible heart failure.

What are the symptoms of heart blockage?

“Heart blockage” can refer to different problems, including narrowing of the coronary arteries or an electrical conduction block. If someone means a blockage in the coronary arteries, symptoms may include:

• Chest pressure, tightness or discomfort
• Breathlessness, especially during exertion
• Pain or discomfort spreading to the arm, shoulder, back, neck or jaw
• Sweating
• Nausea
• Unusual fatigue

Importantly, some people can have heart disease without classic chest pain. New or unexplained breathlessness, particularly during exertion, therefore deserves medical attention rather than being automatically attributed to the lungs or anxiety.

Can anxiety cause shortness of breath?

Yes. Anxiety and panic can cause noticeable breathing changes.

During anxiety, you may breathe more quickly or feel as though you cannot get enough air. A racing heartbeat, trembling, sweating, dizziness and a feeling of fear can occur at the same time.

There can also be a cycle: feeling breathless can increase anxiety, and anxiety can make breathing feel even more difficult.

However, new or unexplained breathlessness should not automatically be blamed on anxiety. If you are unsure whether anxiety is responsible, medical assessment is appropriate.

What are the three types of shortness of breath?

There is no single universally accepted medical classification of exactly “three types” of shortness of breath. For everyday understanding, breathlessness can be described according to its pattern:

Acute breathlessness: develops suddenly and may occur with asthma attacks, infections, pulmonary embolism or other urgent conditions.

Chronic breathlessness: continues for weeks or longer or repeatedly returns. Asthma, COPD, heart disease and chronic lung conditions can cause it.

Exertional breathlessness: occurs mainly during physical activity, such as walking or climbing stairs. It can result from poor fitness but may also occur with heart, lung or blood conditions.

The pattern, duration and accompanying symptoms help doctors identify the likely cause.

How to confirm shortness of breath?

There is no single test that “confirms” shortness of breath because dyspnea is a symptom rather than a disease.

A doctor may begin by asking:

• When did the breathing difficulty begin?
• Does it occur at rest or only with activity?
• How quickly did it develop?
• Is it getting worse?
• Do you have cough, wheezing or fever?
• Do you have chest pain or palpitations?
• Does lying down make it worse?
• Do you smoke or have a history of lung or heart disease?

Depending on your symptoms, investigations may include:

• Pulse oximetry
• Blood tests
• Chest X-ray
• CT scan
• ECG
• Echocardiogram
• Lung function tests
• Exercise testing

These tests help identify whether the underlying problem is related to the lungs, heart, blood or another system.

How to test shortness of breath at home?

You cannot accurately determine the cause of breathlessness at home, but you can record useful information.

A pulse oximeter can measure oxygen saturation and pulse rate. In many healthy people, oxygen saturation is around 95–100%, although acceptable levels can differ in people with certain lung conditions and at high altitude. Home readings can also be affected by cold fingers, poor circulation, nail polish, skin pigmentation and device limitations.

You can also note:

• Your breathing rate
• Heart rate
• What activity triggers breathlessness
• How long it lasts
• Whether symptoms occur at rest
• Associated symptoms such as chest pain, cough or dizziness

Do not use a normal pulse oximeter reading to dismiss severe symptoms. If you are struggling to breathe, have chest pain, blue lips, confusion or other emergency symptoms, seek urgent medical care.

How long is shortness of breath normal?

Breathlessness after vigorous exercise can be normal and should generally improve as you recover.

For example, it is expected to breathe heavily temporarily after running, climbing several flights of stairs or doing strenuous exercise. However, unexplained breathlessness that persists, repeatedly occurs, is becoming worse, or appears with ordinary activities should not simply be considered normal.

There is no fixed number of minutes or days that makes unexplained breathlessness “normal.” The context matters.

How to ease shortness of breath?

If you suddenly become breathless, stop the activity and sit upright. Try to remain calm and loosen restrictive clothing.

Slow, controlled breathing can help some people, particularly when anxiety or dysfunctional breathing contributes to the sensation. One commonly used approach is to breathe gently through the nose and slowly breathe out through relaxed or pursed lips.

If you already have asthma, COPD or another diagnosed condition, follow the breathing and medication plan provided by your doctor.

If the cause has not been established, repeatedly treating the symptom without finding the cause is not advisable.

How to make breathing go back to normal?

The most effective way to restore normal breathing is to treat the underlying cause.

Depending on the diagnosis, treatment may involve:

• Inhalers for asthma or COPD
• Antibiotics for certain bacterial infections
• Treatment for anaemia
• Heart medications for cardiovascular conditions
• Allergy treatment
• Pulmonary rehabilitation
• Breathing exercises
• Improving physical fitness gradually
• Oxygen therapy when medically indicated

There is no single medicine that works for every type of breathlessness. Treatment should therefore be based on the diagnosis.

What is the best medicine for shortness of breath?

There is no single best medicine for shortness of breath.

An inhaler may help someone with asthma, while another person may need treatment for heart failure, anaemia, infection or another condition. Taking someone else’s inhaler, antibiotics or heart medication without medical advice can be inappropriate and potentially harmful.

The right treatment depends on the reason you are breathless.

What are some home remedies for shortness of breath?

Home measures can sometimes make mild breathlessness more comfortable, but they should not replace medical assessment when the cause is unknown.

You can try:

• Sitting upright rather than lying flat
• Keeping the room well ventilated
• Moving away from smoke, dust, fumes or other irritants
• Practising slow, controlled breathing
• Using prescribed respiratory medicines exactly as directed
• Maintaining appropriate physical activity when medically safe
• Staying hydrated unless your doctor has advised fluid restriction

If breathlessness is new, persistent or worsening, seek medical advice rather than relying on home remedies.

How to remove breathing problems?

Breathing problems cannot always be “removed” permanently because treatment depends on the underlying condition.

For some people, treating an infection may resolve breathlessness completely. For others, conditions such as asthma or COPD require long-term management. Heart conditions may also require ongoing treatment.

Lifestyle measures can help reduce the risk of respiratory problems:

• Avoid smoking and vaping.
• Avoid second-hand smoke.
• Reduce exposure to dust, fumes and severe air pollution.
• Maintain a healthy weight.
• Stay physically active according to your fitness and medical condition.
• Manage existing heart and lung conditions.
• Keep recommended vaccinations up to date.
• Seek medical advice when breathing symptoms change.

The Cleveland Clinic also recommends avoiding lung irritants, practising breathing exercises, maintaining healthy weight and avoiding poor air quality where possible.

How to clean lungs naturally?

Your lungs do not need a special detox drink, supplement or cleansing therapy. The body has its own mechanisms for clearing mucus and inhaled particles.

The most useful things you can do for lung health are:

• Stop smoking if you smoke.
• Avoid second-hand smoke.
• Minimise exposure to dust, chemical fumes and polluted air.
• Stay physically active when appropriate.
• Treat asthma, allergies and respiratory infections appropriately.
• Maintain good overall health.

Be cautious of products marketed as “lung detoxes” or “lung cleanses.” There is no substitute for removing the source of lung irritation and treating an actual medical condition.

Can shortness of breath go away?

Yes, depending on the cause.

Breathlessness caused by strenuous exercise may disappear after recovery. Breathlessness associated with a temporary infection may improve as the infection resolves. Anxiety-related breathing symptoms can also improve when the underlying anxiety and breathing pattern are addressed.

On the other hand, chronic conditions such as COPD, heart failure or interstitial lung disease may require long-term management rather than a one-time cure.

The key is to identify the cause instead of simply trying to suppress the symptom.

When should you see a doctor for shortness of breath?

Make an appointment if:

• Breathlessness keeps coming back.
• You are becoming breathless with less activity than before.
• It interferes with work, walking or daily activities.
• It is worse when lying down.
• You have swollen ankles or feet.
• You have a persistent cough or wheezing.
• You have unexplained fatigue.
• Your breathing has gradually become worse.

Medical evaluation is especially important when breathlessness is new or unexplained.

Frequently asked questions about shortness of breath

Is shortness of breath a lung or heart problem?

It can be either. Lung conditions such as asthma, COPD and pneumonia are common causes, while heart failure and other cardiovascular conditions can also cause breathlessness. Anaemia, anxiety, poor fitness and several other conditions can produce similar symptoms.

Can shortness of breath be caused by anxiety alone?

Yes, anxiety and panic attacks can cause significant breathlessness. However, unexplained or new symptoms should not automatically be attributed to anxiety until other possible causes have been considered.

Is shortness of breath after exercise normal?

Breathing heavily after strenuous exercise is usually a normal physiological response. Breathlessness that seems disproportionate to the activity, takes unusually long to settle or occurs with ordinary activities should be evaluated.

Can a pulse oximeter diagnose the cause of breathlessness?

No. A pulse oximeter estimates oxygen saturation and pulse rate; it does not identify whether breathlessness is caused by asthma, heart disease, infection, anxiety or another condition.

Can breathing exercises cure shortness of breath?

Breathing exercises may help control breathlessness and can be particularly useful when anxiety or breathing-pattern problems contribute to symptoms. They do not treat every underlying cause of dyspnea.

When is shortness of breath an emergency?

Sudden or severe breathing difficulty, particularly with chest pain, fainting, blue or grey lips, confusion or an inability to speak normally, requires emergency medical attention.

Does shortness of breath always mean something is seriously wrong?

No. Breathlessness can occur after strenuous exercise, during anxiety, at high altitude or because of poor fitness. However, persistent, unexplained or worsening breathlessness should be assessed because it can also indicate heart or lung disease.

Final thoughts

Shortness of breath is a symptom, not a diagnosis. Sometimes it is temporary and harmless; at other times it can be the first noticeable sign of a heart, lung or blood-related problem.

Pay attention to when the breathlessness occurs, how quickly it developed, what triggers it and what other symptoms appear alongside it. Breathlessness during exercise, breathlessness at rest, breathlessness when lying down and sudden unexplained breathlessness can have very different causes.

Most importantly, do not ignore severe or rapidly worsening breathing difficulty. If you have sudden severe shortness of breath, chest pain or pressure, blue lips, confusion, fainting or difficulty speaking because you cannot catch your breath, seek emergency medical care immediately.

For persistent or unexplained symptoms, a proper medical evaluation can help determine whether the problem is related to the lungs, heart, blood, anxiety or another underlying condition—and guide the appropriate treatment.

Medical disclaimer: This article is intended for general health education and does not replace examination, diagnosis or treatment by a qualified healthcare professional.

To consult a Doctor at Sparsh Diagnostic Centre, call our helpline number 9830117733.

 

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