Dizziness when you get up may be due to postural hypotension, or it may be due to suffering from cervical spondylosis, usually low blood pressure, as follows: 1. Postural hypotension: This is an autonomic dysfunctional disease, generally patients have high blood pressure in the prone position and low blood pressure in the upright position. Suddenly standing up from the prone position may cause a transient drop in blood pressure, resulting in low perfusion to the brain and causing insufficient blood supply to the brain. Insufficient blood supply to the cerebellar brainstem can lead to dizziness, balance disorders and ataxia, and insufficient blood supply to the brain may lead to limb sensory and motor dysfunction.2. Normally low blood pressure: getting up suddenly can also lead to transient cerebral hypoperfusion, and cause cerebral hypoperfusion, especially in middle-aged and elderly people with greater incidence. If the movement is slowed down a bit, the symptoms may improve. 3, cervical spondylosis: cervical spondylosis can occur at the same time with muscle pain and discomfort in the neck and shoulders, and cervical spine nuclear magnetic examination can make a clear diagnosis.