Pleural effusion refers to the accumulation of fluid in the pleural cavity, which is caused by the accumulation of excessive fluid in the pleural cavity, and can be treated by treating the primary disease, as well as surgical puncture and drainage. There are many causes of pleural effusion, such as tuberculosis, bacterial infection, cardiac insufficiency, etc. To treat pleural effusion caused by tuberculous peritonitis, anti-tuberculosis drugs such as isoniazid and rifampicin can be used; penicillin and tetracycline can be used for bacterial infection; and diuretics, such as furosemide, can be used for cardiac insufficiency. In addition, surgery can also be carried out through puncture drainage, the fluid will be suctioned clean, and at the same time, attention should be paid to avoid the emergence of thoracic cavity adhesion, and daily attention should be paid to the prevention of primary illnesses, such as tuberculosis, pneumonia and so on. Please follow the doctor’s prescription for medication.