High blood pressure can cause dizziness, but when dizziness occurs even after blood pressure has normalized, it is important to consider dizziness caused by diseases other than hypertension. Inadequate blood supply to the vertebrobasilar artery: Patients with hypertension are highly susceptible to cerebral atherosclerosis, and the vertebrobasilar artery is the main artery supplying blood to the cerebellum and brainstem. Insufficient blood supply to the vertebrobasilar artery can cause transient ischemic attacks in the cerebellar region. The cerebellum is involved in the regulation of somatic balance and muscle tone, as well as the coordination of random movements. When the cerebellum is ischemic, the above functions are affected, and patients may experience vertigo and dizziness, unstable walking, vomiting, and tinnitus, with a high incidence of vertigo in particular. When accompanied by blurred vision, diplopia, hearing loss, slurred speech, dysphagia, abnormal sensation in the face and limbs, and transient impairment of consciousness are more helpful for diagnosis. Stroke: Stroke will likely occur when reduced cardiac output occurs on top of cerebral atherosclerosis. Dizziness can be caused by cerebellar ischemia or hemorrhage. Heart diseases such as coronary heart disease, heart valve disease, and atrial fibrillation may cause dizzy manifestations. These dizziness manifestations may be accompanied by symptoms such as chest tightness, chest pain, and shortness of breath. The presence of heart disease can be identified by electrocardiogram, cardiac ultrasound, and coronary CT. If dizziness persists even after blood pressure is lowered, patients should not ignore this symptom and promptly inform their doctors for further disease screening and timely management of hypertensive complications.