As a pulmonologist with extensive experience in treating patients with chronic obstructive pulmonary disease (COPD), I can provide you with a detailed understanding of the four stages of this condition. It's important to note that COPD is a progressive disease, which means it worsens over time, and it is categorized into four stages based on the severity of symptoms and the level of lung function impairment. 1. Stage 1 (Mild COPD): This is the earliest stage of COPD, also known as mild COPD. At this stage, the symptoms are usually not very noticeable and may include a persistent cough and some shortness of breath, particularly after physical activity. 2. Stage 2 (Moderate COPD): As the disease progresses to this stage, the symptoms become more noticeable and frequent. Individuals may experience increased coughing, production of mucus, shortness of breath, and decreased exercise tolerance. 3. Stage 3 (Severe COPD): In this stage, COPD symptoms are significantly more severe and have a substantial impact on a person's quality of life. Breathing becomes much more difficult, even when performing simple daily activities. The individual may also experience exacerbations, which are periods of increased symptoms that require medical attention. 4. Stage 4 (Very Severe COPD): This is the most advanced and debilitating stage of COPD. At this point, the person has very low lung function and experiences constant severe symptoms. Exacerbations are frequent and can be life-threatening. The individual may also have chronic respiratory failure, which may require long-term oxygen therapy. It's crucial for individuals with COPD to work closely with their healthcare providers to manage their symptoms, slow the progression of the disease, and improve their quality of life. read more >>

As you know, there are four total stages of chronic obstructive pulmonary disease (COPD), ranging from mild to very severe. ... Severe stage COPD, or stage 3 COPD, causes significant changes in symptoms, lung health and overall health. The final stage of COPD is also known as stage 4, or very severe.read more >>