Chronic obstructive pulmonary disease (COPD) is a progressive lung disease which includes emphysema, chronic bronchitis, refractory asthma, and some forms of bronchiectasis. This disease is characterized by increasing breathlessness, wheezing, tightness in chest etc. In the early stages, there may be no symptoms but the symptoms gradually increases in later stages. Shortness of breath, chronic cough, fatigue, frequent flu, weight-loss etc. are the symptoms exhibited in the later stages. Spirometry, chest X-ray, arterial blood gas test etc. are the common tests for diagnosing COPD. Smoking, genetic factors and environmental pollution are some major risk factor that developed chronic obstructive pulmonary diseases.