Dizziness is a common symptom in clinical practice, and even significant head vertigo and even blurred vision can occur, the specific causes of which need to be analyzed. The common clinical causes of such diseases, the most common vertebral artery cervical spondylosis, mainly due to long-term sedentary, ambulatory work, looking down at the phone, looking at the computer and other causes of cervical degeneration and hyperplasia, so that after the head down will cause the pressure in the neck to rise, resulting in stimulation of the vertebral artery, triggering spasm of the vertebral artery, followed by insufficient blood supply to the vertebral basilar artery system, and the performance of the cranial ischemia, dizziness and other symptoms The result is cranial ischemia and dizziness. The symptoms are often obvious when the head is lowered, and often improve when the head is raised or tilted and rested for a period of time, so if such symptoms occur frequently, ultrasound of the vertebral artery and MRI of the skull and cervical spine can be performed to clarify. In addition, this symptom can also be seen in sympathetic cervical spondylosis. If the cervical spine is unstable and stimulates the cervical sympathetic trunk during head movement or head lowering, it can lead to sympathetic excitation or inhibition, especially when the head is lowered, which can lead to slowed heart rate and lowered blood pressure, and can also cause ischemia in the skull, resulting in dizziness after head lowering. If dizziness occurs frequently, it is recommended to go to neurology or orthopedics for investigation and cervical spine MRI to clarify the cause before treating the cause to avoid delaying the condition.