Pleurisy is usually not fatal. Pleurisy is caused by infectious diseases (inflammatory reaction caused by infection of the pleura by pathogens such as Mycobacterium tuberculosis, influenza virus, etc.), neoplastic diseases, connective tissue diseases, and metabolic diseases, and is often manifested clinically by chest tightness and chest pain, coughing and sputum, and dyspnea. Most pleurisy can be cured after standardized treatment. However, if the pleurisy is caused by cancer, it is impossible to cure, because the original disease is difficult to cure, so this kind of pleurisy is also difficult to cure, and the patient’s death is often caused by the deterioration of the disease, pleurisy itself basically does not cause death. When pleurisy occurs, it is necessary to go to the hospital for treatment at the first time, in order to recover soon after standardized treatment.