Dizziness is a subjective sensation in which a person feels light-headed, unsteady in standing or walking, and has no sense of movement or rotation of self or external objects, while dizziness is when the patient sees things around him/her rotating. If dizziness and vertigo are together, it can be called vertigo, which means that a person has a kinesthetic hallucination of self or external objects, a self-perceived balance disorder and self-perception error of spatial position, and the patient subjectively feels that self or external objects are rotating, swinging, straight, tilting, and lifting. For dizziness and vertigo, it can be caused by vestibular dysfunction, including systemic vertigo, such as peripheral vertigo, which is common in clinical practice, and central vertigo, which can be seen in posterior circulation ischemia. If it is non-systemic vertigo, it is the result of systemic diseases, which can be caused by hypertension or coronary heart disease or anemia.