Blood pressure is not high but dizziness is considered to be a sign of carotid stenosis and neurologic disease. 1. Stenosis of the carotid artery system: The internal carotid arteries on both sides supply the anterior 2/3 of the brain, and dizziness may occur when one side of the carotid artery system is stenotic and does not have good collateral circulation. Internal carotid arteriography is recommended for a definitive diagnosis. 2. Neurological diseases: Excluding the cardiovascular system, the first consideration is neurological diseases such as otolithiasis, cervical spondylosis, vertebral artery stenosis, brain tumors and so on. Neurology is recommended. If there is any relevant situation, it is recommended to consult the doctor in time to avoid further development of the disease. Please follow the doctor’s instructions for specific treatment.