ICP is the abbreviation for increased intracranial pressure in Western medicine. The main manifestations of increased intracranial pressure include headache, nausea, vomiting, optic papilledema, and blurred vision. There are many causes of increased intracranial pressure, the common causes are as follows: First, acute cerebrovascular disease, divided into cerebral hemorrhage and cerebral infarction, after the onset of patients will have cerebral edema, brain parenchyma volume increase, causing the pressure in the cranial cavity to increase. Second, hydrocephalus, caused by traumatic brain injury, cerebral hemorrhage, mainly due to cerebrospinal fluid circulation pathway obstruction, the patient mainly manifested ventricular widening, intracranial pressure increase. Third, hypertensive encephalopathy, a sudden rise in blood pressure, after reaching the range of cerebrovascular regulation, there will be an increase in cerebral blood flow and a significant increase in intracranial pressure. Fourth, intracranial infectious diseases, such as septic meningitis and viral encephalitis. Fifth, intracranial occupying lesions, such as arachnoid cyst, meningioma, and glioma are common.