Electroencephalogram (EEG) is a graph obtained by amplifying and recording the spontaneous biological potentials of the brain from the scalp by means of an instrument. EEG should be performed in all clinically suspected epilepsy cases because it is the most important means of diagnosing epileptic seizures and epilepsy and helps to categorize epileptic seizures and epilepsy. Depending on the frequency and amplitude, EEG waves can be categorized into alpha waves, beta waves, Q waves and delta waves, and normal EEG can generally be categorized into alpha waves and beta waves. Abnormal EEG can be categorized as mild, moderate and severe abnormalities. The spontaneous or evoked appearance of high amplitude spikes, sharp waves, or spikes and slow waves is suggestive of epileptic manifestations. During the examination, it is required not to be nervous, to relax all the muscles of the body, and to open or close the eyes or breathe excessively according to the doctor’s requirements. Stop taking sleeping sedatives and antiepileptic drugs 1-3 days before the examination, wash your hair with soapy water one day before the examination, and eat before the examination, not on an empty stomach.