An IV drip is an intravenous infusion is a highly specialized technique that uses the principle of atmospheric pressure and fluid hydrostatic pressure to deliver large amounts of sterile fluids, electrolytes, and drugs into the body from a vein. But it still has some harmful effects because there are some adverse reactions, febrile reactions. Fever, chills, hyperthermia, accompanied by nausea and vomiting, and even shock can occur because of the input of pyrogenic substances. Heart failure is caused by the rapid infusion of too much fluid into the blood system in a short period of time, resulting in an increase in the load on the heart. Phlebitis, a local infection of the vein due to the failure of the infusion apparatus to meet the sterility requirements, or inflammation of the vein due to prolonged infusion of highly concentrated and irritating drugs. Air embolism, because the air in the infusion tube is not drained, or the catheter is not connected tightly, and the air enters the vein, and there is abnormal discomfort in the lung and chest, which may lead to respiratory distress or even death. Pulmonary edema is the sudden feeling of chest tightness, shortness of breath, coughing while infusion, and the appearance of blood sputum in foam. Therefore, we should be alert to the hazards of infusion, and it is better to be able to choose its indications for treatment and regulate infusion.