Wake up feeling dizzy, clinically known as vertigo, vertigo may be caused by physiological factors, may also be the manifestation of certain diseases such as otolithiasis, Meniere’s disease, transient ischemic attack, cervical vertigo and so on. 1. Physiological factors: when getting up, due to a sudden change in body position, the blood can not return to the brain in a timely manner, resulting in a transient lack of cerebral blood supply, which leads to dizziness. 2. Otolithiasis: clinically known as benign positional vertigo. Due to trauma, structural degeneration and other reasons, otoliths are dislodged. When the head position changes, the dislodged otolith fragments can be displaced to the balance structures such as semicircular canals and the crural cap of the jugular ridge, thus inducing dizziness and vertigo. 3. Ménière’s disease: It is a disease of the inner ear characterized by the accumulation of water in the membranous labyrinth. Patients may manifest sudden onset of vertigo, gradual loss of hearing, tinnitus, ear distension and other symptoms, which may be accompanied by nausea and vomiting, pallor, and drop in blood pressure during vertigo attacks. 4. Transient ischemic attack: due to cerebral vascular sclerosis, embolism and other vascular diseases, resulting in incomplete blood supply to the internal carotid artery system and insufficient blood supply to the vertebral basilar artery, which causes transient ischemia locally and thus vertigo, and may be accompanied by abnormal eye movement. Usually, the duration is very short and no lesion is formed. 5. Vertebral artery type cervical spondylosis: this disease is mainly due to cervical spine hyperplasia, cervical intervertebral disc herniation and other reasons, compression of the vertebral artery when the neck activity can be compression of the vertebral artery, so that the blood flow is not smooth, to the vestibular system of ischemia and vertigo, when the patient rotates the neck can be triggered by the onset of vertigo, the head of confusion. There are many reasons for waking up with dizziness, it is recommended to go to the hospital for timely consultation and standardized treatment in accordance with medical advice.