Patients with symptoms of nausea and dizziness after hanging an IV, consider the following reasons: 1, to consider that it may be the infusion reaction of drugs, in this case the patient must promptly stop the infusion and replace the infusion line. At the same time to observe the condition, if necessary, to do desensitization of the patient; 2, the patient hanging needle after nausea, dizziness, if the speed of infusion is relatively fast, a large amount of liquid input in a short period of time, if the patient is an elderly person, the heart and lung function is not good, easy to cause the patient to appear heart failure, will also cause dizziness, nausea, chest tightness, shortness of breath symptoms; 3, the patient hanging needle after nausea, dizziness, there may also be the disease itself caused, for example, if the patient is an upper respiratory tract infection disease, the endotoxin released by pathogenic bacteria or viruses will act on the central nervous system and cause dizziness.