A normal adult is considered to have increased cranial pressure if it exceeds 1,96 kPa (200 mmH2O). Intracranial occupying lesions, intracranial infectious diseases, craniocerebral injury, cerebral hypoxia, etc. can all cause intracranial hypertension. Causes of increased cranial pressure: 1. Intracranial occupying lesions Intracranial tumors, hematomas, abscesses, cysts, granulomas, etc., can occupy a certain volume in the cranial cavity and block the circulatory pathway of cerebrospinal fluid, affecting its circulation and absorption, resulting in increased intracranial pressure. 2, intracranial infectious diseases various encephalitis, cerebral parasitic diseases, can stimulate the choroid plexus to secrete too much cerebrospinal fluid, but also can cause cerebrospinal fluid circulation obstruction (obstructive and traffic hydrocephalus) and malabsorption. Toxins from various bacteria, fungi, viruses, and parasites can damage brain cells and cerebral vessels, causing cytotoxicity and vasogenic cerebral edema. Inflammation, parasitic granuloma can also play an occupying role, occupying a certain space in the cranial cavity. 3.Cranial injury Can cause intracranial hematoma and edema. 4.Brain hypoxia Such as asphyxia, anesthesia accident, CO poisoning, and certain systemic diseases, such as pulmonary encephalopathy, epilepsy, persistent state severe anemia, etc., can cause brain hypoxia and further cause vascular-derived and cytotoxic brain edema. 5, poisoning Lead, tin, arsenic and other poisoning; certain drug poisoning, such as tetracycline, vitamin A overdose, etc.; self-poisoning, such as uremia, hepatic encephalopathy, etc., can cause cerebral edema, promote the secretion of cerebrospinal fluid from the choroid plexus, and can damage the automatic regulation of cerebral blood vessels, and the formation of high cranial pressure. 6, endocrine dysfunction Young women, obese people, especially menstrual disorders and pregnancy are prone to benign intracranial pressure increase, may be related to excessive estrogen, adrenocorticotropic hormone secretion and low brain edema. In obese people, it may be related to the relative hypoadrenocorticism caused by the inability of some steroids to function by dissolving in adipose tissue.