Whether or not a pleural effusion should be present in pleurisy is largely dependent on the extent of the patient’s condition. If the effusion is only considered to be caused by pneumonia, the symptoms will improve significantly after active anti-infective treatment. Pulmonary effusion is clinically divided into many kinds, such as tuberculous pleurisy is the most common, tuberculous pleurisy should be actively thoracentesis, the pleural fluid as much as possible, at the same time to be standardized anti-tuberculosis treatment, pleural effusion will also be significantly improved, more important is the pleural mesothelioma caused by pulmonary effusion, because it is malignant tumor, the resulting effusion is very difficult to treat, more complex, usually to take Comprehensive treatment is the main focus.