The more you sleep, the more tired you get, which may be related to physiological factors such as sleeping too long, or may be caused by insufficient blood supply to the brain, cervical spondylosis and other reasons. 1. Physiological factors: If you sleep too long, especially if you sleep for a long time in an environment with poor air circulation, it is easy to cause hypoxia in brain tissue, which may cause more and more tiredness, and may be accompanied by dizziness, weakness and other manifestations. 2. Insufficient cerebral blood supply: patients with intracranial and extracranial vascular stenosis or occlusion may have insufficient cerebral blood supply, and at the same time, the blood flow rate slows down when sleeping compared to waking up, which will further aggravate the insufficient cerebral blood supply, and may cause more and more tiredness, and may be accompanied by dizziness, headache and other symptoms. 3. Cervical spondylosis: cervical spondylosis patients in the sleep if the pillow pillow is too high, easy to lead to stiff neck muscles, tension, is likely to compress the local blood vessels, affecting the blood supply of the vertebral basilar artery, which may cause the more you sleep the more tired you get. The more you sleep, the more tired you get, may also be related to other factors, if the symptoms occur frequently, or there are other obvious discomfort, it is recommended to consult a doctor as soon as possible, to give targeted treatment.