The normal blood pressure range is 90-140mmHg systolic and 60-90mmHg diastolic in the resting state. 61/102mmHg in the resting state is the normal blood pressure range. Insufficient cerebral blood supply: exertion, staying up late, and postural changes may cause transient cerebral blood supply deficiency; the presence of risk factors such as hyperlipidemia and smoking may induce cerebral atherosclerosis, leading to pathological cerebral blood supply deficiency, which can be manifested as normal blood pressure, but still dizziness, weakness, blurred vision, and even transient limb movement disorders, etc. The diagnosis can be clarified by perfecting cranial CT, cranial magnetic examination, etc.; 2. Cervical spondylosis : such as vertebral artery cervical spondylosis, the protruding cervical disc compresses the vertebral artery, or may affect the blood supply of the vertebral artery, causing impaired posterior circulation, which may lead to dizziness, nausea, weakness, tinnitus and other symptoms in patients, which can be further clarified by perfecting cervical CT and other examinations; 3, otolithosis: mostly due to the degeneration of otoliths with age, or affected by trauma and other factors, leading to intense dizziness in patients, which may be accompanied by visual rotation, Nausea, vomiting, nystagmus and other corresponding symptoms can be performed to help confirm the diagnosis by audiological examination, balance function examination and CT or MRI.