An EEG one year after epilepsy surgery may be abnormal or normal. Surgery may be considered for epileptics who have been treated with formal monotherapy for a long period of time, or who have reached the maximum tolerated dose of two antiepileptic medications sequentially, as well as for those who have failed to respond to a single formal, combination therapy. Appropriate surgical treatment can reduce the patient’s seizures and potentially lead to complete control. Therefore, if seizures remain after surgery, the EEG may be abnormal, and if the epilepsy is fully controlled after surgery, the EEG may be normal or mildly abnormal. EEG after epilepsy surgery can be used as a test to assess epilepsy, it may be normal or abnormal, but the presence or absence of seizures needs to be taken into account clinically.