cerebral edema
(seh-REE-brul eh-DEE-muh)
A buildup of fluid in the brain that causes swelling and increases pressure inside the skull. This pressure prevents the brain from getting enough oxygen and blood flow, which can lead to brain damage if not treated. Cerebral edema can be caused by brain injuries, stroke, infections, tumors, or high altitudes. Symptoms may include headache, dizziness, nausea, vomiting, vision changes, vision loss, and difficulty speaking or moving.