The initial symptoms of epilepsy include altered consciousness, convulsions, and symptoms of vegetative nerve dysfunction. 1. Altered consciousness: patients may show sudden loss of consciousness, drowsiness or even coma. 2. Convulsions: usually manifested as twitching of limbs, grand mal seizures are often twitching of limbs, petit mal seizures can be a single limb or one side of the limb twitching, there are also patients who manifested as facial twitching, crooked mouth and eyes, and so on. 3. Symptoms of vegetative nerve dysfunction: patients may manifest foaming at the mouth, respiratory secretions, headache and dizziness, nausea and vomiting, dysfunction of urinary and defecation, abdominal pain, diarrhea and so on. Epileptic seizures are mainly caused by abnormal brain discharges, which are episodic, repetitive, stereotyped and transient. Seizures are sudden and can show significant symptoms in the early stages. If you have a seizure with suspicious symptoms, it is important to seek medical attention as soon as possible to avoid irreversible brain damage.