How long the increased intracranial pressure will last is mainly determined by the cause of the increased intracranial pressure and the treatment measures. If the cause of increased intracranial pressure is traumatic brain injury, cerebral hemorrhage, brain tumor and hydrocephalus, etc., the intracranial pressure can be rapidly decreased by craniotomy to remove hematoma, resect the tumor, and perform hydrocephalus shunt surgery, and the intracranial pressure can be restored to normal within two weeks or so after the postoperative cerebral edema subsides. If the increase in intracranial pressure is due to intracranial septic infection, or diffuse axonal injury, brain swelling and other causes of increased intracranial pressure, due to this is not suitable for craniotomy, you need to take dehydrating agents and other drugs to reduce intracranial pressure, usually this kind of increased intracranial pressure lasts for a relatively long period of time, usually in about a month to return to normal. If you feel unwell, go to a regular hospital in time and under the guidance of a professional doctor.