Dyspnoea

Dyspnoea, commonly known as shortness of breath, is the uncomfortable feeling that you cannot get enough air into your lungs. It can affect your daily activities and quality of life, but understanding its causes and learning to manage it can help you breathe easier.

Table of contents

• What is dyspnoea?
• Types of dyspnoea
• Signs and symptoms
• What causes dyspnoea?
• Who is more likely to experience dyspnoea?
• When to seek medical help
• How is dyspnoea diagnosed?
• Treatment options
• Managing dyspnoea at home
• Prevention strategies

What is dyspnoea?

Dyspnoea (pronounced “DISP-nee-uh”) is the medical term that healthcare providers use to describe the feeling of shortness of breath^[1]. When you experience dyspnoea, you might feel like you cannot get enough air into your lungs, as if you are gasping for air or working harder to breathe^[1]. You might also describe it as chest tightness or a feeling of suffocation^[2].

shortness of breath, breathlessness

This condition is a symptom rather than a disease itself. It is a very common problem, with millions of people experiencing it and many seeking emergency care because of it^[3]. The sensation can range from mild and temporary to serious and long-lasting^[2].

Types of dyspnoea

Dyspnoea can be classified based on how quickly it develops and how long it lasts. Understanding these different types helps doctors determine the underlying cause and appropriate treatment.

Acute dyspnoea

Acute dyspnoea comes on quickly and typically lasts for a short period, from hours to days^[1]. It can be caused by allergies, anxiety, exercise, or illness like the common cold or flu^[1]. More serious conditions such as a heart attack, sudden airway narrowing, or blood clots in the lungs can also trigger acute dyspnoea^[1].

Chronic dyspnoea

Chronic dyspnoea is shortness of breath that persists for a long time, typically more than four to eight weeks, or keeps coming back^[3]. Ongoing health conditions like asthma, heart failure, and chronic obstructive pulmonary disease (COPD) commonly cause chronic dyspnoea^[1]. Even lack of regular exercise can lead to chronic breathlessness because your muscles work harder to get more oxygen^[1].

Paroxysmal nocturnal dyspnoea

Paroxysmal nocturnal dyspnoea (PND) is a specific type where you feel like you cannot breathe an hour or two after falling asleep, which may wake you up^[1].

Sighing dyspnoea

Sighing dyspnoea occurs when you find yourself sighing frequently after taking deep breaths in an attempt to relieve the feeling of breathlessness^[1].

Signs and symptoms

The feeling of dyspnoea can vary from person to person and depends on what is causing it. Sometimes it occurs with other symptoms^[1].

Common signs of dyspnoea include^[1][2]:

• Chest tightness
• Feeling like you need to force yourself to breathe deeply
• Working hard to get a deep breath
• Rapid, shallow breathing
• Heart palpitations (feeling your heart racing or pounding)
• Wheezing or noisy breathing
• Coughing
• Feelings of being smothered or suffocated
• Difficulty getting a deep breath

What causes dyspnoea?

Dyspnoea can result from many different conditions affecting various body systems. It is a symptom that can arise from problems with your heart, lungs, breathing system, nerves, muscles, mental health, or other systemic illnesses^[3].

How heart and lung conditions cause dyspnoea

Your heart and lungs work together as a team to bring oxygen to your blood and tissues while removing carbon dioxide. When either organ is not working properly, you can end up with too little oxygen or too much carbon dioxide in your blood^[1].

When this happens, your body signals you to breathe harder to get more oxygen in or push carbon dioxide out. Any situation that makes your body need more oxygen, like vigorous exercise or being at high altitudes, can also trigger this response^[1].

Your brain can also receive signals that your lungs are not working correctly. This might make you feel like you are working harder to breathe or create a feeling of tightness in your chest. Causes include irritation in your lungs or restriction in the way your lungs move^[1].

Respiratory causes

Common respiratory conditions that cause dyspnoea include^[3][5]:

• Asthma
• Chronic obstructive pulmonary disease (COPD)
• Pneumonia
• Pulmonary embolism (blood clot in the lungs)
• Lung cancer
• Pneumothorax (collapsed lung)
• Pulmonary fibrosis (scarring of lung tissue)
• Pulmonary hypertension

Cardiovascular causes

Heart-related conditions that can lead to breathlessness include^[3][5]:

• Congestive heart failure
• Heart attack
• Cardiac arrhythmia (abnormal heart rhythms)
• Cardiomyopathy (heart muscle disease)
• Valvular heart defects
• Pericardial tamponade (fluid around the heart)

Other causes

Additional causes of dyspnoea include^[2][3]:

• Anemia (low red blood cell count)
• Anxiety and panic attacks
• Obesity
• Lack of physical fitness
• Foreign objects blocking airways
• Allergic reactions
• Metabolic acidosis
• Thyrotoxicosis
• Anaphylaxis (severe allergic reaction)
• Sepsis (severe infection)

Who is more likely to experience dyspnoea?

Because dyspnoea has so many possible causes, shortness of breath is very common. However, certain factors increase your likelihood of experiencing breathlessness^[1][5]:

• Not getting enough exercise
• Anemia (low level of red blood cells)
• Anxiety disorders
• Heart, lung, or breathing problems
• A history of smoking
• Respiratory infections or pneumonia
• A body mass index (BMI) over 30
• Cancer, especially lung cancer
• Emphysema or chronic bronchitis
• Gastroesophageal reflux

When to seek medical help

Shortness of breath can signal a medical emergency that requires immediate attention. Understanding when to seek help is crucial for your safety.

Emergency situations

Call emergency services immediately (911 or your local emergency number) if you experience^[2][6]:

• Severe difficulty breathing
• Chest feeling heavy or painful
• Pain spreading to your arms, back, neck, or jaw
• Lips, skin, or nails turning very pale, blue, or gray
• Sudden confusion
• Inability to catch your breath even after 30 minutes of rest
• Something seriously interfering with your ability to breathe
• Stridor (high-pitched noisy breathing)
• High fever along with breathlessness

When to contact your doctor

Contact your healthcare provider if^[1][6]:

• Breathlessness occurs while resting
• Shortness of breath wakes you up at night
• You feel breathless after mild activities
• You also have a fever
• You experience tightness in your throat or wheezing
• You have swollen ankles or feet
• Your symptoms are persistent or worsening

How is dyspnoea diagnosed?

Because shortness of breath can result from many different medical conditions, diagnosing the exact cause can be challenging but is essential for proper treatment^[5].

Your doctor will begin by taking a detailed medical history and performing a physical examination. This includes checking your vital signs such as blood pressure and blood oxygen levels, and listening to your lungs^[6].

Diagnostic tests may include^[5][6]:

• Chest X-ray or CT scan to look at your lungs and heart
• Blood tests to check for anemia or other conditions
• Pulmonary function tests to measure how well your lungs work
• Electrocardiogram (EKG) to assess heart function
• Echocardiogram (ultrasound of the heart)
• Cardiopulmonary exercise testing to measure how your body uses oxygen and how your heart and lungs function during exercise
• Computed tomography (CT) scans for detailed imaging

In some cases where the cause remains unclear, advanced testing such as cardiopulmonary exercise testing with catheters may be performed. This specialized test assesses how your body utilizes oxygen and measures heart and lung function during exercise on a stationary bike or treadmill^[5].

Treatment options

Treatment for dyspnoea focuses on addressing the underlying disease or condition causing the breathlessness^[5]. The specific treatment depends entirely on what is causing your symptoms.

Medications

Your doctor may prescribe different medications depending on the cause^[5][6]:

• Bronchodilators to open airways for conditions like asthma and COPD
• Steroids to reduce swelling and inflammation
• Pain medications to relieve discomfort
• Anxiety medications if stress or panic contributes to breathlessness

Oxygen therapy

Oxygen therapy can help increase blood oxygen levels when they are too low^[6].

Surgical interventions

Depending on the cause, some conditions may require surgical treatment. For example, if dyspnoea is caused by pleural effusion (fluid around the lungs), draining the fluid from inside the chest can reduce shortness of breath^[5].

Exercise and rehabilitation

Regular, moderate physical activity plays a crucial role in managing dyspnoea. Engaging in gentle exercises like walking, cycling, or swimming can significantly improve lung function, build endurance, and make breathing less difficult over time^[6].

For best results, start slowly and gradually increase duration and intensity. Aim for consistency rather than intensity, as shorter, frequent sessions are often more beneficial. Always consult your healthcare provider before beginning a new exercise routine^[6].

Managing dyspnoea at home

You can take several steps at home to help manage shortness of breath and make daily activities easier.

Breathing exercises

Learning specific breathing techniques can dramatically reduce breathlessness episodes and improve overall respiratory function^[5].

Pursed-lip breathing is an effective technique: Inhale slowly through your nose, then gently exhale through pursed lips as if blowing out a candle. This helps regulate your breathing rhythm and reduces anxiety related to breathlessness^[1].

Diaphragmatic breathing, also called abdominal breathing, focuses on deep, controlled breathing to strengthen your diaphragm and improve oxygen intake^[1].

Practicing these exercises daily offers a simple yet powerful way to manage breathing problems that you can use anywhere, anytime.

Positions to ease breathlessness

Certain body positions can make breathing easier. Being propped up rather than lying flat helps many people breathe more comfortably. You can raise your head on pillows or raise the head of your bed^[5].

Relaxation techniques

Difficulty breathing can cause feelings of anxiety and panic, and conversely, anxiety and panic can increase your shortness of breath. Relaxation, meditation, and breathing exercises can help break this cycle^[5].

Planning daily activities

Making changes to how you do everyday tasks can reduce the energy you use and help you breathe easier:

• Move items you need downstairs to avoid unnecessary trips
• Keep frequently used items within easy reach
• Use a trolley or wheeled bag to carry shopping or laundry
• Pace yourself and allow rest times between activities
• Get out of bed slowly and sit on the edge before standing
• Avoid rushing by giving yourself plenty of time
• When climbing stairs, take your time and match your breaths to your steps

Prevention strategies

While you cannot prevent all causes of dyspnoea, certain lifestyle changes can reduce your risk and improve symptoms^[6]:

• Follow the treatment plan your doctor prescribes, including taking medications as directed
• Avoid exposure to irritants such as chemicals, paint fumes, or car exhaust
• Practice breathing exercises and relaxation techniques regularly
• Stop smoking and avoid secondhand smoke
• Maintain a healthy weight through balanced nutrition
• Incorporate fresh fruits, vegetables, whole grains, and lean proteins into your diet
• Reduce intake of processed foods, saturated fats, salt, and sugars
• Stay hydrated
• Stay indoors when air pollution levels are high
• Get vaccinated against respiratory infections like influenza and pneumonia
• Stay as physically active as your condition allows

Even modest lifestyle changes, such as losing weight if you are overweight, can substantially reduce breathing difficulties and provide long-term benefits for managing dyspnoea^[6].