Chronic obstructive pulmonary disease

01

What it is

COPD is a long-term lung condition with persistent difficulty moving air out of the lungs. It includes varying combinations of small-airway disease and emphysema and can cause breathlessness, cough, sputum, wheeze, reduced exercise capacity, and flare-ups. Symptoms often develop gradually and can be mistaken for aging or poor fitness. COPD is not contagious, and although lung damage may not fully reverse, treatment can improve symptoms, function, and future risk.

Sources for this section: [1] [3]

02

Symptoms and how it may present

COPD includes persistent airflow obstruction associated with changes often called emphysema or chronic bronchitis. Tobacco is a leading cause, but household and outdoor air pollution, workplace dusts or fumes, impaired lung growth, prior infections, asthma, and rare alpha-1 antitrypsin deficiency also contribute. Symptoms usually develop gradually and may be dismissed as ageing or lack of fitness.

Sources for this section: [1] [3]

03

Causes and risk factors

Tobacco smoke is a major cause, but household and outdoor air pollution, occupational dusts and fumes, recurrent early-life respiratory problems, impaired lung growth, asthma, infections, and alpha-1 antitrypsin deficiency also contribute. COPD can occur in people who never smoked, and blame interferes with care. Identifying ongoing exposure matters because reducing it can slow further injury. Earlier-than-expected disease, family history, or liver disease may prompt testing for alpha-1 antitrypsin deficiency.

Sources for this section: [1] [2]

04

Diagnosis and tests

Tests should answer a clinical question and be interpreted together with symptoms, examination, and history.

Diagnosis should be confirmed with spirometry showing persistent obstruction after a bronchodilator, not symptoms or an X-ray alone. Assessment records breathlessness, activity, cough, sputum, flare-ups, smoking and other exposure, oxygen level, inhaler technique, nutrition, mood, and other heart or lung conditions. Imaging, blood tests, walking tests, or alpha-1 testing are used when indicated.

Sources for this section: [1] [2] [3]

05

Treatment options

The best option depends on severity, other conditions, likely benefit and harm, access, and personal priorities.

Long-acting bronchodilator inhalers are central; inhaled corticosteroids are added for selected patterns because benefits and pneumonia risk differ. Correct inhaler technique and access can matter as much as the prescription. Pulmonary rehabilitation improves exercise capacity and quality of life. Oxygen helps people with verified severe resting hypoxemia, not breathlessness alone, and selected severe disease may need procedures or transplant assessment.

Sources for this section: [2] [4]

06

Daily life and supportive care

Stopping smoking is the most effective way to slow exposure-related damage. Regular activity, adequate protein and energy, vaccination against relevant respiratory infections, clean-air measures, and prompt treatment of flare-ups support health. Being underweight and losing muscle can be as important as excess weight. Supplements do not reverse lung damage; sedatives and unregulated remedies can worsen breathing or interact with treatment.

Sources for this section: [1] [2] [4]

07

Monitoring and follow-up

Follow trends that can change a decision rather than collecting measurements without a purpose.

Review breathlessness, cough and sputum, activity, sleep, flare-ups, emergency visits, medicine use, inhaler technique, oxygen levels when indicated, smoking or exposure status, nutrition, mood, and other heart or lung disease. Repeat spirometry when it will clarify progression or a decision, not simply at every visit. After a flare-up, reassess recovery, treatment, rehabilitation, and prevention. Oxygen is prescribed from measured criteria; breathlessness alone does not show whether long-term oxygen will help.

Sources for this section: [2] [3] [4]

08

Complications and long-term outlook

COPD varies widely. Continued harmful exposure, repeated flare-ups, low activity, poor nutrition, and coexisting heart disease can worsen outcomes, while exposure reduction, appropriate inhalers, pulmonary rehabilitation, vaccination, and early flare-up treatment can preserve function. Advanced disease may involve low oxygen, high carbon dioxide, weight and muscle loss, pulmonary hypertension, or respiratory failure. Goals-of-care and advance planning should be offered without withdrawing active symptom treatment.

Sources for this section: [1] [2] [4]

09

When to seek urgent help

A flare-up means a sustained worsening beyond usual day-to-day variation, often more breathlessness, cough, or sputum. Severe breathlessness at rest, blue or grey lips, confusion, drowsiness, chest pain, inability to speak, or failure of the agreed rescue plan needs urgent care. A written plan should state when to increase inhaled treatment, contact the team, and use prescribed steroids or antibiotics.

Sources for this section: [1] [2] [3]

10

Questions to discuss with a care team

A guideline describes what tends to help groups of people, but it cannot decide what matters most in one person’s life. Revisit the plan when symptoms, function, other illnesses, pregnancy plans, medicine access, side effects, or personal priorities change. Ask for plain-language reasoning and say directly when cost, time, transport, caregiving, or treatment complexity makes a recommendation unrealistic.

• What evidence supports this diagnosis, and is there another condition we still need to rule out?
• What is the treatment goal, and how do the main options differ in benefit, harm, burden, and cost?
• What should be monitored, how often, and what result would change the plan?
• Which symptoms require a routine appointment, urgent assessment, or emergency care?

Sources for this section: [2] [4]