Because syncope has seizures and some symptoms are similar to epilepsy, such as loss of consciousness, dilated pupils, and even convulsions and incontinence, it is easy to misdiagnose it as epilepsy, and the following points can be used for reference in differential diagnosis. 1. Triggers: Most syncope has obvious triggers, while epilepsy has no obvious triggers and sudden seizures. 2, position: syncope mostly occurs in the standing position, partly in the sitting position, rarely in the lying position, while epilepsy is not necessarily. The fainting attack is usually a slow collapse, while the epileptic collapse is a sudden occurrence. 3, prodromal symptoms: syncope is often preceded by prodromal symptoms, such as dizziness, blurred vision, pallor, abdominal discomfort, etc., while pediatric epilepsy is less common. 4, the difference between syncope and aphasic seizure: the latter starts and stops suddenly, is brief and does not fall, there are no prodromal symptoms and post-ictal discomfort. 5, the difference between syncope and grand mal seizure: pale face, lower blood pressure, slow and weak pulse during syncope. And grand mal seizure with cyanosis, blood pressure is not low, and pulse is increased. Biting of the tongue and urinary incontinence are rarely seen in syncope but mostly in grand mal seizures. Convulsions caused by syncope are rare, and if they do occur, they are very short, usually within 15 seconds, while grand mal convulsions are relatively long. There is apnea in grand mal seizures but not in syncope. Grand mal seizures often have post-ictal drowsiness and positive neurological signs, while syncope usually does not. 6, EEG: In syncopal seizures are mainly slow waves, after syncopal seizures EEG is normal, while epilepsy mostly has corresponding discharge waves. 7, other: such as checking blood sugar can diagnose hypoglycemic syncope, cardiac examination can help diagnose cardiogenic syncope.