Suddenly high blood pressure, dizziness and vomiting are considered to be elevated intracranial pressure, which may be due to physiological reasons, hypertensive encephalopathy, hyperthyroidism and so on. 1. Physiological factors: when emotional excitement, sympathetic nerve excitation, there may be dizziness, blood pressure rise, this is generally transient, to be relieved when the mood is calm. 2. Hypertensive encephalopathy: Hypertensive encephalopathy due to excessive elevation of blood pressure leads to high cerebrovascular pressure, then there will be increased intracranial pressure such as dizziness, nausea, blurred vision and so on. At this time, it is necessary to quickly consult a doctor and actively lower the blood pressure, which can be given sodium nitroprusside and so on. However, the speed of lowering the blood pressure should not be too fast to avoid adverse reactions. 3. Hyperthyroidism: the body’s metabolism is vigorous, there will be a faster heart rate, headache, etc., also easily lead to increased blood pressure. Medications such as methimazole tablets, propylthiouracil tablets, levothyroxine sodium tablets, etc. can be used under doctor’s advice. You should seek medical advice for the above conditions and follow the doctor’s instructions for treatment.