For low cranial pressure, which mainly refers to the pressure of cerebrospinal fluid below 60 mmH2O at the time of lateral lumbar puncture, the patient can experience headache, dizziness, and in severe cases, nausea and vomiting. For the consequences that low cranial pressure can lead to: firstly, the patient can have headache, which is due to the relatively low blood pressure, and the headache can increase when the body position changes. Secondly, low cranial pressure can also lead to vertigo, mainly because low cranial pressure can stimulate blood vessel spasm and cause insufficient blood supply to the brain. In addition, hypocranial pressure can also lead to impaired consciousness, which is usually seen after cranial surgery or cranial injury. Hypocranial pressure can also lead to autonomic dysfunction, with fever, excessive sweating, respiration, and increased pulse rate. Hypocranial pressure can also lead to symptoms of mental disorders, such as decreased ability to work and depression in some patients.