Waking up feeling dizzy can be caused by low sleep quality, sleep apnea syndrome and insufficient blood supply to the brain. 1. Physiological factors: poor sleep quality, insomnia, dreams and other conditions can lead to wake up feeling dizzy, which is due to low quality of sleep so that the brain and the body does not get enough rest caused by. 2. Sleep apnea syndrome: sleep apnea syndrome is due to the upper respiratory tract anatomical structure is narrow or occluded, resulting in apnea during sleep, this disease not only affects the sleep at night so that the quality of sleep is low, but also affects the daytime life and work, appearing after waking up dizziness and heavy phenomenon. 3. Insufficient cerebral blood supply: Insufficient cerebral blood supply may also lead to dizziness after waking up, this is due to cerebral ischemia and hypoxia, which may lead to dizziness and dizziness, and the patient may also suffer from a series of symptoms such as fatigue and lack of concentration. If after excluding physiological factors, the symptoms of waking up feeling dizzy and heavy still persist, please consult a doctor in time to avoid delaying the condition.