Blood pressure of 140 mmHg can cause dizziness. The symptoms of hypertension are not directly related to the level of blood pressure. Some patients with high blood pressure do not have any symptoms, while others with mildly elevated blood pressure may experience significant dizziness and headaches. Dizziness that occurs with a blood pressure of 140 mmHg may also be caused by other causes, such as cervical spondylosis, anemia, viral colds, etc. If the dizziness is caused by high blood pressure, the symptoms of dizziness will gradually be relieved when the blood pressure returns to normal after active antihypertensive treatment. If the blood pressure drops and the symptoms of dizziness are still not relieved, other causes of dizziness should be considered and the cause should be actively sought so that targeted treatment can be given.