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Overview

What Is Pulmonary Disease?

Pulmonary disease is a broad term for conditions that affect the lungs, airways, or blood vessels within the lungs. Some conditions are acute, meaning they begin suddenly and may last a short time, while others are chronic and continue for months or years. Causes can include infections, smoking, pollution, allergies, inherited conditions, and problems with lung development. Severity varies widely, so a lung disease may cause mild symptoms in one person and serious breathing problems in another.

AIRFLOW PROBLEMS

Obstructive diseases make it harder to move air out of the lungs. Examples include asthma, chronic bronchitis, and emphysema.

LUNG TISSUE

Restrictive diseases limit how fully the lungs can expand. Pulmonary fibrosis is one example and may cause a lasting reduction in lung capacity.

INFECTIONS

Infections can inflame or fill parts of the lungs with fluid. Pneumonia and tuberculosis are examples of infectious lung disease.

LUNG BLOOD VESSELS

Some conditions affect blood flow through the lungs, such as pulmonary hypertension or a pulmonary embolism.

Symptoms

Symptoms of Pulmonary Disease

  • Shortness of breath, which may occur at rest or during activity.
  • A cough that may be dry or produce mucus.
  • Mucus production, sometimes with a change in amount or color.
  • Wheezing, or a high-pitched whistling sound while breathing.
  • Chest discomfort, tightness, or pain.
  • Fatigue or reduced energy, especially during physical activity.
  • Coughing blood (hemoptysis), even when the amount is small.
  • Bluish lips or fingertips (cyanosis), which can indicate low oxygen.

Causes

Causes of Pulmonary Disease

SMOKE AND VAPOR

Tobacco smoke and some vaping exposures can irritate and damage the airways and lung tissue over time.

INFECTIONS

Viruses, bacteria, fungi, and other organisms can inflame the airways or cause infection in lung tissue.

AIR AND WORKPLACE EXPOSURES

Air pollution, dust, fumes, chemicals, and workplace particles may injure the lungs or worsen inflammation.

ALLERGY OR INFLAMMATION

Allergies and immune-system inflammation can narrow the airways or damage lung tissue.

INHERITED CONDITIONS

Some people inherit changes that affect lung structure, mucus clearance, or protection against tissue damage.

LUNG DEVELOPMENT

Abnormal lung development or early-life factors can leave the lungs more vulnerable to disease later.

Some pulmonary diseases have one clear cause, while others develop through several interacting genetic, environmental, and medical factors. Repeated irritation or inflammation can cause lasting airway narrowing or lung damage, contributing to chronic obstructive pulmonary disease and other obstructive chronic lung disease.

Risk Factors

Risk Factors for Pulmonary Disease

Risk factor typeExamples
ModifiableSmoking, secondhand smoke, occupational dust, fumes, chemicals, and air pollution
Nonmodifiable or less modifiableAge, family history, genetics, childhood lung development, and prior lung disease
  • Repeated respiratory infections may irritate the airways or damage lung tissue over time.
  • Asthma or another chronic airway disease can increase the likelihood of ongoing breathing problems.
  • Immune-system disorders may make infections or inflammatory lung conditions more likely.
  • Long-term exposure to dust, fumes, or chemicals can increase the risk of lung disease.
  • Low birth weight or reduced lung growth in childhood may affect lung function later in life.

Complications

Complications of Pulmonary Disease

  • Recurrent respiratory infections.
  • Worsening loss of lung function.
  • Low blood oxygen (hypoxemia).
  • Respiratory failure requiring urgent medical support.
  • Pulmonary hypertension, or high blood pressure in the lung arteries.
  • Heart strain caused by long-term pressure or low oxygen levels.
  • Reduced ability to work, exercise, or perform daily activities.

COMPLICATION RISK

Severity varies by condition

Complication risk depends on the specific pulmonary disease, its severity, smoking or exposure history, and how consistently it is treated. These complications do not occur in every person with lung disease.

Diagnosis

How Pulmonary Disease Is Diagnosed

Diagnosis begins with a review of symptoms, exposure history, smoking history, medicines, and previous illnesses, followed by a physical examination. Clinicians use this information to decide which tests can identify the cause and measure how well the lungs are working.

LUNG FUNCTION TESTS

Spirometry and other pulmonary function tests measure airflow, lung volumes, and how efficiently the lungs work.

IMAGING

A chest X-ray or CT scan can show infection, scarring, structural changes, or other problems in the lungs.

OXYGEN TESTING

A pulse oximeter or blood test can help assess the amount of oxygen carried in the blood.

LABORATORY TESTS

Blood tests and sputum testing may help identify infection, inflammation, or another underlying cause.

SPECIALIST PROCEDURES

Bronchoscopy or other procedures may be considered when imaging and routine tests do not provide enough information.

Treatment & Management

Treatment and Management

REMOVE EXPOSURES

Stopping smoking and reducing contact with dust, fumes, pollution, or other irritants can help protect lung function.

MEDICINES

Depending on the diagnosis, medicines may open the airways, reduce inflammation, treat infection, or prevent flare-ups.

REHABILITATION

Pulmonary rehabilitation combines supervised exercise, education, and breathing strategies to support activity and daily function.

OXYGEN SUPPORT

Prescribed oxygen or other breathing support may be used when the lungs cannot maintain adequate oxygen levels on their own.

INFECTION OR INFLAMMATION CARE

Antibiotics, antivirals, anti-inflammatory medicines, or other targeted treatment may be used when appropriate.

PROCEDURES

Selected conditions may require procedures or surgery, based on the cause, severity, and response to other treatment.

  • Take prescribed medicines as directed.
  • Use inhalers with the correct technique and ask for a demonstration if needed.
  • Avoid tobacco smoke and harmful workplace or household exposures.
  • Attend follow-up appointments and recommended lung-function testing.
  • Stay physically active as tolerated and consider pulmonary rehabilitation when recommended.
  • Receive recommended vaccines to help prevent respiratory infections.
  • Follow an individualized action plan for worsening symptoms or flare-ups.

TREATMENT IS INDIVIDUALIZED

Management depends on the diagnosis

Treatment must be matched to the specific pulmonary disease. Medicines and oxygen are not interchangeable across conditions, so do not change or stop them without clinical guidance.

Prevention

Can Pulmonary Disease Be Prevented?

  • Do not smoke or use tobacco products.
  • If you smoke, seek support to quit tobacco.
  • Avoid secondhand smoke and unnecessary air pollution.
  • Use recommended protective equipment around workplace dust, fumes, and chemicals.
  • Improve indoor ventilation and reduce exposure to household pollutants.
  • Keep recommended vaccinations up to date.
  • Manage asthma and other chronic conditions according to a clinician’s plan.

Not all pulmonary diseases are preventable, particularly inherited or developmental conditions. However, reducing harmful exposures, preventing infections, and managing existing respiratory disease early can lower risk or slow worsening for some conditions.

Outlook and Prognosis

Outlook and Prognosis

Some pulmonary diseases resolve with treatment, while others are chronic, progressive, or require lifelong monitoring. There is no single outlook for all lung disease: prognosis depends on whether the underlying problem is reversible, how early it is treated, and how well the lungs respond to care.

  • The specific diagnosis and cause of the pulmonary disease.
  • Lung-function results and the amount of remaining breathing capacity.
  • Disease stage or severity and the frequency of flare-ups.
  • Ongoing smoking or exposure to dust, fumes, or other irritants.
  • Other medical conditions that affect the heart, immune system, or general health.
  • Response to medicines, rehabilitation, and other treatment.

When Should You See a Doctor

When Should You See a Doctor?

  • A cough that does not improve or keeps returning.
  • Shortness of breath during routine activities.
  • Repeated wheezing or chest tightness.
  • Frequent respiratory infections.
  • Unexplained fatigue or a noticeable decline in exercise ability.
  • Coughing blood, even if the amount seems small.

GET URGENT HELP

Do not wait for severe breathing problems

Seek urgent or emergency care for severe or rapidly worsening difficulty breathing, blue or gray lips, confusion, fainting, severe chest pain, or significant coughing of blood. These warning signs require prompt assessment and should not be used to self-diagnose a specific condition.

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