Cervical spondylosis can cause drowsiness and lethargy because most patients with cervical spondylosis are suffering from a condition caused by compression of the nerves in the neck. The compression of the nerves affects the oxygen supply to the brain, which in turn leads to insufficient blood supply to the brain and mild arteriosclerosis, thus causing drowsiness. And because cervical spondylosis is a degenerative change in the joints of the cervical spine, resulting in compression of the sympathetic nerve at the cervical spine, which can lead to insufficient blood supply to the vertebral artery, which in turn affects the work of the brain, so patients with cervical spondylosis are prone to drowsiness and sleepiness. If the situation is more serious, it is recommended to go to the hospital immediately for examination, and CT can be done on the brain to develop a suitable treatment plan according to the examination results. The treatment of cervical spondylosis can also choose physical therapy methods such as acupuncture, tui na and massage, which are also more effective methods.