Chronic obstructive pulmonary disease (COPD) is the name for a collection of lung diseases including chronic bronchitis, emphysema and chronic obstructive airways disease. The main symptom of COPD is an inability to breathe in and out properly. This is also referred to as airflow obstruction.
NHS Choices - Guide to the symptoms, diagnosis, treatment and risks of COPD from the NHS.
COPD Factsheet - This factsheet is for people who have chronic obstructive pulmonary disease (COPD), or who would like information about it.
British Lung Foundation - Information and guidance on living with COPD
These links all come from trusted resources but if you are unsure about these or any other medical matters please contact your doctor or pharmacist for advice.