There are many clinical causes of dizziness, other than hypertension and hypotension. If the blood pressure is normal but you still have dizziness, you can basically rule out the dizziness caused by blood pressure. First of all, for middle-aged and elderly people, we should consider the presence of central nervous system pathologies, such as cerebral infarction and cerebral blood supply deficiency, which can cause dizzy episodes. Some diseases of the vestibular nerve, such as vestibular neuritis caused by viral infection, can cause dizziness. Benign episodes of positional vertigo can also present with dizziness. In cervical spondylosis, dizziness can be the main manifestation of the patient and can be identified by cervical spine CT or MRI. Other systemic diseases of the body can manifest as dizziness. Therefore, there are more clinical diseases that cause dizziness, and further differentiation should be made based on medical history, clinical manifestations and ancillary examinations.