Understanding COPD

What COPD is

COPD - chronic obstructive pulmonary disease - is a long-term lung condition in which the airways are damaged and narrowed, making it hard to move air in and out. It includes emphysema (damage to the air sacs) and chronic bronchitis (long-term airway inflammation and mucus).

COPD develops slowly over years, which is why it is usually diagnosed in people over 40. It is progressive - it tends to worsen over time - but treatment and lifestyle changes can slow that course substantially and keep people active for longer.

What causes it

Smoking is the cause in the large majority of cases, including heavy second-hand exposure. Long-term exposure to other lung irritants - air pollution, chemical fumes, and dust from certain workplaces - also causes COPD, as can indoor smoke from solid cooking fuels, a major cause worldwide.

A rare inherited deficiency of a protective protein (alpha-1 antitrypsin) causes COPD in some people who never smoked, and is worth testing for when the disease appears young or without smoke exposure.

How it shows up and is diagnosed

The typical symptoms are persistent cough, cough with mucus, shortness of breath on effort that gradually limits more and more activity, wheezing, and chest tightness. People often adapt without noticing - taking the lift, avoiding hills - until the limitation is substantial.

Diagnosis rests on spirometry, a simple breathing test that measures how much air a person can blow out and how fast. It confirms the airflow obstruction and grades its severity. Flare-ups (exacerbations) - sudden worsenings often triggered by infections - are a defining feature and a major reason for hospital care.

Treatment and living with it

The single most effective step is stopping smoking: no medicine slows COPD as much as quitting does. Inhalers are the backbone of drug treatment - bronchodilators that open the airways, sometimes combined with inhaled steroids - and pulmonary rehabilitation, a supervised program of exercise training and education, reliably improves breathlessness and quality of life.

Flu and pneumonia vaccinations reduce the infections that trigger flare-ups. Some people with severe disease need oxygen therapy, and a small number are candidates for surgery or bronchoscopic procedures.

Medical advice is worth seeking for persistent cough and breathlessness, and urgently for severe worsening: major breathlessness at rest, confusion, or bluish lips or face. Early diagnosis changes the trajectory.