Lying down and getting up dizziness, can not stand, may be caused by cerebral ischemia and hypoxia, can be seen in postural hypotension, the disease is an autonomic dysfunction of the disease, generally lying down the blood pressure is high, the upright position of the blood pressure is low. If you stand up suddenly from the prone position and move too violently, it may cause a transient drop in blood pressure, which will cause insufficient blood supply to the brain, and the above symptoms may occur, or there may be blackness in front of the eyes or limb sensory disorders, motor dysfunction, and so on. If the blood pressure is usually low, a sudden rise may also cause a transient hypoperfusion of the brain, leading to insufficient cerebral blood supply. It may also be caused by cervical spondylosis, which may compress the foramen transversarium and may result in insufficient blood supply to the vertebral basilar artery system, leading to the above symptoms.