X: Diseases of the respiratory system

J40-J47: Chronic lower respiratory diseases

Chronic lower respiratory diseases underscore a group of conditions that persistently affect the lungs and the structures located in the lower part of your respiratory system. These diseases generally progress over time and are primarily caused by smoke inhalation, especially from tobacco products, though they can also stem from factors such as air pollution, occupational chemicals, and dust. Critical conditions in this group include chronic obstructive pulmonary disease (COPD), bronchitis, and emphysema. Symptoms frequently comprise shortness of breath, excess mucus production, chest tightness, and continuous coughing. Over time, these conditions can adversely impact daily activities, cause significant lung damage and may also lead to heart problems due to the increased strain these conditions place on the heart's functioning. Notably, these diseases are not infectious and cannot be passed from person to person.