Getting up dizzy after lying down for a long time may be caused by postural hypotension. The peripheral blood vessels are dilated and blood is distributed to peripheral tissues when the patient is lying down, and sitting up at once may lead to insufficient blood supply to the brain, causing dizziness, blurred vision and other symptoms. In addition, attention should also be paid to whether the change in position causes patients to develop vertebral artery cervical spondylosis, Meniere’s syndrome, etc. These diseases may also cause dizziness, blurred vision, and rotated vision when the patient changes position, and need to be differentiated.