There are many causes of dizziness, nausea, and weakness, such as cerebrovascular disease, anemia, infectious diseases, and cervical spondylosis. 1. If the patient is middle-aged or elderly, cerebral arteriosclerosis, cerebral vascular stenosis, and insufficient blood supply to the brain may cause dizziness, nausea, and weakness. 2. 3. Patients with anemia can also experience dizziness, nausea, and weakness when the anemia is severe, and the patient may have pale eyelids. 4. Cervical spine pathology can cause the above symptoms, and if the patient is in a posture for too long or inappropriate posture, it is considered to be caused by cervical spondylosis, which can be clarified by doing cervical spine CT or cervical spine MRI.