Dizziness is a common clinical symptom. There are many causes of dizziness, and the common diseases are as follows: 1. Cervical spine diseases cause dizziness due to inadequate blood supply to the vertebral basilar artery. Common clinical symptoms include dizziness, neck discomfort, shoulder pain, and numbness of the limbs. 2. Inadequate blood supply to the cerebral arteries, such as anemia, abnormal blood pressure, and cerebral vascular spasm. The appearance of dizziness can be checked for blood routine, blood pressure, blood lipids, etc. 3, poor sleep quality, patients who stay up late or have poor sleep quality for a long time can also show symptoms of dizziness, which is caused by brain cells not getting sufficient rest. 4, transient ischemic attack, also called TIA, is a precursor symptom of cerebral infarction, and common clinical symptoms include dizziness, numbness of limbs, unfavorable speech, etc., which can return to normal.