Chronic Obstructive Pulmonary Disease, also known as COPD, causes difficulty breathing due to physical changes within the lungs. Sufferers experience ongoing inflammation inside the respiratory system, leading to irregularities in both the airways and alveoli; this served to constrict airflow, exacerbate mucus generation, and trigger a relentless cough. All three factors amalgamate to induce breathlessness over the long-term. Additionally, the exhalation process causes the airways to collapse and compress, resulting in trapped air and an overexpanded lung capacity. This impedes the inspiration of new air into the body and diminishes pulmonary proficiency write this text in human sentence in clear and simple language to understand