The patient was 16 years old, and at the age of 6, he started to have involuntary jerking of the left side of the mouth for 1-2 minutes, and he was conscious during the seizure. At that time, he went to the hospital and was diagnosed with “epilepsy” after checking the EEG for “mild abnormalities” and was treated with valproic acid. At the age of 10, the patient had a seizure with dizziness, pale face, limbs weakness, falling to the ground, fuzzy consciousness and sweating, which lasted for 1 minute and improved without hunger, palpitations, or convulsions. One week ago, the patient developed involuntary twitching at the left corner of the mouth for 1 minute without drooling and without any impairment of consciousness. The family thought that the seizure had recurred and came to our hospital for consultation. The patient was born in a normal birth with normal development. There was no history of febrile convulsions. Physical examination did not show any abnormality. The cranial MRI was not abnormal. 24-hour EEG was normal. The diagnosis of “epilepsy” was highly suspected to be correct, and “tic disorder” and “syncope” were considered, and it was recommended to gradually reduce the valproic acid dosage and stop the drug after 3 months. Afterwards, the 24-hour EEG was normal. The diagnosis of epilepsy needs to be consistent with its characteristics: seizure, transient, repetitive, and stereotyped. Episodic means that the symptoms are not persistent; transient describes the short duration of symptoms, usually within tens of seconds to 5 minutes; repetitive means that 1 seizure must be followed by a second seizure to fit the characteristics; and stereotypic indicates that the symptoms are basically the same for each seizure. It can be seen that the patient’s symptoms in this case are episodic, transient, and “stereotypical?” but less repetitive. The patient has had only two episodes of orofacial jerking in 10 years and is not a typical symptom of epilepsy and should not be considered first for the diagnosis of epilepsy. Other than typical symptoms, the diagnosis of epilepsy requires EEG support, and epilepsy can be diagnosed if there is a clear epileptiform discharge on the EEG at the time of seizure. If the EEG is nonspecific altered, the accuracy of the epilepsy diagnosis needs to be reconsidered. Do not easily confirm or deny the diagnosis of epilepsy; sometimes it takes time to test, after all, if it is epilepsy, it is sure to have another seizure. Treatment of epilepsy is a long-term process, and medications can have adverse physical and psychological effects. Therefore, a clear diagnosis is needed before medication is administered, and close observation is needed during medication so that misdiagnosis and misdiagnosis are not easily made, and even treatment errors can be detected and dealt with early.