Dizziness upon head movement may be related to benign positional vertigo, or it may be caused by cervical spondylosis, hypertension and other reasons. 1. Benign positional vertigo: when the position of the head changes, otoliths are easily dislodged into the semicircular canals, which will cause dizziness with every movement of the head, and may be accompanied by nystagmus, visual rotation and other symptoms. 2. Cervical spondylosis: If there is severe cervical spondylosis, which leads to stiffness and tension of the neck muscles, when the head changes position, it will stimulate the pulling of the surrounding nerves and blood vessels, which may cause dizziness, and may be accompanied by numbness and pain of the scalp and pain in the neck and shoulders. 3. High blood pressure: If there is high blood pressure, it will lead to increased pressure inside the cerebral blood vessels. In this state, if the position of the head undergoes a big change, it is likely to lead to obstacles in blood circulation in the brain, thus causing dizziness. Dizziness when the head moves, may also be caused by other reasons, if the symptoms continue to be unable to alleviate, or the existence of other obvious discomfort, should be as early as possible to consult a doctor, diagnose the causes, give targeted treatment.