After the extraction of pleural effusion, first of all, pay attention to the puncture hole site to see if there is any effusion exuding, any signs of infection such as redness, pain and rupture. Do good hygiene of the puncture site, do not wash it for 3 days and cover it with dressing for 3 days. Pay attention to the patient’s basic condition and any manifestation of pleural reaction, such as panic, pallor, dizziness, nausea, weakness, etc., as well as dyspnea aggravated by pneumothorax. Monitor blood pressure blood sugar, heart rate and other vital signs. Timely treatment measures such as oxygen, epinephrine, anti-allergy, and flat position after the appearance of discomfort to avoid accidents.