The clinical manifestations of intracranial hypotension are mainly headache and dizziness when the body position changes, such as headache and dizziness when the patient gets up from lying down, accompanied by nausea and vomiting in severe cases, and the headache and dizziness are relieved quickly after lying down. Some patients may also have psychiatric symptoms, such as aggressive behavior, and some may have seizures. Patients may also experience neck or shoulder and back pain, all of which are related to low intracranial pressure. Low intracranial pressure is mainly due to the short time of bed rest after lumbar puncture, some patients get up too early and move around, and patients with cerebral hemorrhage who have ventricular drainage and too much drainage fluid may also have headache, nausea and vomiting as a result of low intracranial pressure.