Dizziness is considered to be sympathetic cervical spondylosis, vertebral artery cervical spondylosis, and so on. 1. Sympathetic cervical spondylosis: degeneration of intervertebral discs and segmental instability will stimulate the sympathetic nerve endings around the cervical vertebrae, causing sympathetic nerve dysfunction, which can cause dizziness and vertigo, memory loss, lack of concentration, confusion, and drowsiness. 2. Vertebral artery-type cervical spondylosis: the compression of cervical spondylotic hyperplasia to the vertebral artery will cause the vertebral – basilar artery system blood supply is insufficient, which can appear dizziness, head is not awake symptoms; part of the vertebral artery-type cervical spondylosis will be combined with sympathetic cervical spondylosis, which will cause vertigo, diarrhea, nausea and vomiting, memory loss, dizziness, etc, and the severity of the symptoms will be sudden collapse. In addition to cervical spondylosis, other diseases can also lead to dizziness and unconsciousness, it is recommended to go to the hospital in a timely manner to identify the cause of the disease for treatment.