Chronic obstructive pulmonary disease (COPD) is an inflammatory lung disease affecting airflow in and out of the airways, making breathing difficult. It is a progressive disease, and if not diagnosed early, can increase the risk of developing cardiovascular or pulmonary diseases. COPD is a group of diseases including emphysema, chronic bronchitis, and chronic obstructive asthma. Identification of warning signs and early diagnosis could help reduce other risks and give a head start in essential treatment. Persistent or chronic cough This is one of the first signs of COPD – a persistent or long-term cough. The American Lung Association recommends seeking a medical diagnosis if a cough lasts more than eight weeks. A chronic cough could be an indication of an underlying issue with the functioning of the lungs. Shortness of breath and wheezing Any type of exercise or exertion is generally accompanied by heavier breathing, but if the feeling of being winded or having shortness of breath occurs during routine activities, it could be an early warning sign of COPD. Obstruction in the air passage causes difficulty in breathing and results in shortness of breath. COPD causes excess mucus to obstruct the airways, and this along with muscular tightening narrows the airways, causing the wheezing sounds when one exhales.