Before the onset of epilepsy, most patients do not exhibit any signs and can suddenly experience an epileptic seizure. Different types of epilepsy have different symptoms. For example, during a major seizure, symptoms can include limb twitching, eyes rolling upwards, frothing at the mouth, clenched teeth, loss of consciousness, and abnormal blood pressure, which can lead to severe falls and injuries. During a minor seizure, the patient mainly shows transient loss of consciousness, objects in hand may suddenly drop, unresponsiveness when called, and a vacant stare. Most patients do not fall, and the symptoms generally last for only a few seconds to tens of seconds. If autonomic epileptic seizures are considered, symptoms may include nausea and vomiting. Psychotic symptom seizures can present with hallucinations and delusions.