Novel coronavirus pneumonia triggers inflammation in the lungs, which can lead to rapid progression of lesions in the lungs. In most patients, the inflammation in the lungs can progress by greater than 50% within 1-2 days, causing dyspnea and respiratory distress, but not necessarily manifesting as chest pain. The main symptom of novel coronavirus pneumonia is dyspnea. The early reaction from the trachea is not obvious, and it is unlikely to enter the lungs to cause pleurisy and pleural effusion. Since the lungs are full of exuding inflammation, it can cause decreased compliance of the lungs, resulting in very difficult breathing. Some patients are overly panicky and can feel tugging pain. The more exudation in the lungs, the harder the lungs become, which eventually leads to non-functioning lungs, and excessive hardening of the lungs can prevent patients from taking in enough oxygen even if they inhale hard. Content source: Dr. Arigato