In general, the need for an EEG should be determined by the condition. However, in the case of medication, it is not recommended at this time for patients who are taking anti-epileptic drugs as well as tranquilizers, as the drugs can have some effect on the results of the test. EEG is a technical means of recording the spontaneous discharges of brain cells in the skull through scalp electrodes. It is mainly used in the diagnosis of epilepsy and the determination of its classification. It is also used to assess the functional state of the brain in patients with encephalopathy and brain death. Antiepileptic drugs and sedative medications can inhibit the spontaneous firing of brain cells, which can lead to negative results and affect the judgment of the condition and further affect the treatment, so EEG is not recommended for these patients. The need for EEG should be determined according to the patient’s condition, symptoms, signs and medical history. It is recommended that the patient go to the neurology department of a regular hospital in a timely manner. Under the guidance of professional physicians to carry out the relevant examination and standardized treatment, so as not to delay the condition.