Cranial pressure as high as 240mmH₂O is a certain risk, counting serious, may cause brain herniation, leading to respiratory and circulatory disorders causing death. Adults normal lying intracranial pressure is 80-180mmH₂O, cranial pressure 240mmH₂O suggests that the cranial pressure has been high, there is a certain risk. Increased intracranial pressure can be caused by intracranial hemorrhage, tumors, stroke, aneurysms, hypertension, brain infections, and hydrocephalus. The most common symptoms of increased intracranial pressure can include headache, optic papilla edema, vomiting, unresponsiveness, and drowsiness. If left untreated seizures, stroke, and neurological damage can occur, which in severe cases can lead to death. With a cranial pressure of 240mmH₂O, it is important to follow your doctor’s advice and get timely treatment to avoid serious consequences.