What Are The Possible Causes For An Abnormal EEG?

What Are The Possible Causes For An Abnormal EEG? Abnormal bleeding (hemorrhage) An abnormal structure in the brain (such as a brain tumor) Tissue death due to a blockage in blood flow (cerebral infarction) Drug or alcohol abuse. Head injury. Migraines (in some cases) Seizure disorder (such as epilepsy) What happens if EEG is abnormal?