What's wrong with a small amount of fluid in the left lung?

A small amount of normal experience in the left lung refers to a small amount of pleural effusion on the left side; a small amount of pleural effusion on the left side can be seen in many diseases clinically, such as viral pleurisy, tuberculous pleurisy, bacterial pleurisy, and malignant tumors can also cause a small amount of pleural effusion on the left side. In addition, attention should be paid to checking cardiac insufficiency and hypoproteinemia. The pleural effusion caused by these diseases will normally be bilateral, or it will cause a small amount of pleural effusion on the right side; However, a small number of patients will show a small amount of pleural effusion on the left side. Attention should also be paid to the investigation of other causes, such as connective tissue diseases, pulmonary infarction, liver cirrhosis and other related diseases.