Dizziness to the left indicates that the patient may have benign paroxysmal positional vertigo or cervical spondylosis, for example. Benign paroxysmal positional vertigo belongs to periventricular vestibular vertigo, also called otolithiasis, which is caused by lesions of the vestibular organs of the inner ear. Patients usually do not have organic disease, but merely dysfunction of the balance organs of the inner ear, most of which are related to otolith formation in the semicircular canals and edema of the membranous labyrinth. Dizziness has a clear correlation with the position of the patient, and it is often obvious when the patient is facing a certain direction, accompanied by rotating vision or even nausea, vomiting, and autonomic reactions such as sweating and panic, which are often short-lived, usually lasting for only a few seconds or a few minutes. When patients with cervical spondylosis rotate their necks, the nerves and blood vessels in the neck may be compressed by the protruding cervical intervertebral discs due to the change in head position, thus causing dizziness. Dizziness caused by turning to the left may also be caused by other reasons, and it is recommended that patients seek timely medical attention to clarify the causes and carry out targeted treatment.