Usually not. Neurological sequelae due to epilepsy are irreversible brain damage caused by intense convulsions during prolonged seizures that result in hypoxia, ischemia and accumulation of toxic metabolites in the body. Not every convulsion or seizure causes significant brain damage, nor is every seizure-induced brain damage irreversible; only in frequent convulsive seizures or prolonged status epilepticus can irreversible and permanent brain damage be caused. There is concern that prolonged seizures may cause mental retardation in patients. This is a complex issue. There are possible causes for these symptoms: 1. coexisting organic neurological lesions; 2. brain damage from recurrent seizures; 3. effects of long-term antiepileptic treatment, etc. However, whether epilepsy has sequelae varies greatly among individuals. It is related to the type of seizure and the epilepsy syndrome to which it belongs. Primary epilepsy, such as aphasia, does not cause brain damage and does not affect intelligence, although the frequency of seizures is high, as many as ten seizures per day. In contrast, symptomatic epilepsy, such as psychomotor seizures, often leaves mental intellectual deficits even if the seizure frequency is not high.