Dizziness after the injection may be caused by the following conditions: First, the most common is dizziness, which has a certain relationship with the quality of the patient; Second, drug reactions, especially allergic reactions. Some people are overly sensitive to some drugs, which can lead to low blood pressure, dizziness, chest tightness, shortness of breath, etc. This requires immediate anti-allergic drugs, rest in place and oxygen; third, to see if the patient’s blood pressure is high, especially in elderly patients who have high blood pressure and use some drugs can lead to dizziness, blood pressure will rise after the use of drugs, it is recommended to measure blood pressure. If it is caused by elevated blood pressure, the above symptoms can be improved by adjusting the antihypertensive program.