Dizziness, nausea, and confusion may be caused by the following factors: 1. Many people may experience dizziness, nausea, and confusion when they stay up late, do not get enough sleep, or are tired. 2. This condition may be caused by cerebrovascular disease, such as cerebrovascular spasm, cerebral blood supply deficiency, and cerebral arteriosclerosis. The symptoms of dizziness, nausea, and confusion are persistent, and can be relieved by blood circulation and blood stasis medication. 3. If the patient has the above symptoms along with stiffness and pain in the neck, especially when the patient does head turning or neck turning, the symptoms are considered to be related to cervical spondylosis, which is cervicogenic dizziness. When the patient’s protruding cervical disc compresses the vertebral artery, it easily leads to insufficient blood supply to the brain and symptoms of dizziness, nausea and confusion.