Waking up dizzy after a night’s sleep may be related to poor sleep quality, or may be caused by sleep apnea syndrome, cervical spondylosis and other reasons. 1. Poor sleep quality: If the recent mental mood is not good, psychological pressure, leading to sleep dreams and easy to wake up, resulting in poor sleep quality, the brain did not get enough rest, you may wake up after a sleep dizziness, may also be accompanied by a headache, mental lethargy and other symptoms. 2. Sleep apnea syndrome: patients with this disease sleep due to frequent snoring, causing sleep apnea, resulting in lack of oxygen to the brain tissue, you may wake up after a night’s sleep, dizziness, accompanied by headaches, sleepiness and other manifestations. 3. Cervical spondylosis: If there is a history of cervical spondylosis, the pillow is too high when sleeping, resulting in local blood vessels. Nerve root compression, causing insufficient blood supply to the vertebral basilar artery, it may cause a sleep to wake up dizzy and lightheaded, can also be accompanied by headache, neck and shoulder pain and other symptoms. Wake up dizzy, may also be caused by other reasons, if accompanied by obvious symptoms of discomfort, should seek medical attention as soon as possible, clear causes given targeted treatment.