Increased blood flow velocity in the right vertebral artery can be caused by vascular stenosis, such as thickening of the intima and narrowing of the lumen of the right vertebral artery due to atherosclerosis, which can lead to increased blood flow velocity after the same blood flow. If a patient is given a cervical vascular ultrasound or an angiographic examination, it can be found that the patient’s arteriosclerosis is more severe and the lumen of the vessel may become thinner. Increased flow velocity in the right vertebral artery can be seen clinically in some patients with vasospasm. The patient is usually prone to headache or poor sleep, and due to the cause of vasospasm, the right vertebral artery becomes continuously constricted, which can manifest the increased blood flow velocity of the right vertebral artery. For increased blood flow due to vasospasm, patients can be given appropriate oral calcium antagonists, such as flunarizine hydrochloride.