There are two cases of cervical spondylosis that cause dizziness when you stand up: first, vertebral artery type cervical spondylosis, which is a condition of cervical spine hyperplasia, irritation and compression of blood vessels, which directly compresses blood vessels causing a reduction in blood supply. Second, cervical spine hyperplasia stimulates the blood vessels leading to the skull and the surrounding nerves, and the stimulation of the nerves causes spasm and contraction of the blood vessels, which also causes poor blood supply. When you stand up, most of the blood flows to the lower extremities, which reduces the blood supply to the upper extremities and the head even more, and the blood vessels that are already poorly supplied with blood spasm even more because of the reduced blood volume, which can cause increased dizziness. Third, sympathetic type of cervical spondylosis can cause dizziness and panic due to stimulation of the nerves, which can cause plant nerve dysfunction, and this stimulation is aggravated when the position changes, causing dizziness more obviously. If you get dizzy when you stand up, you should also pay attention to the fact that in addition to cervical spondylosis, for example, the slightest movement of the head can cause significant spinning, nausea, vomiting, etc. To exclude otoliths, you need to pay attention to clear examination and symptomatic treatment.