Can febrile seizures cause permanent brain damage?

Usually not: To call the seizure as a febrile seizure, the age of the child should be between 6 mo and 6 yrs, the seizure should be associated with the sudden raise of high temp, the sizure should be generalized and less than 15 mins, even if it is prolonged and it was purely a febrile seizure, it does not cause permanent brain injury.

By definition-no: The problem in infancy is separating out the ones that have a seizure disorder that became evident during an event, or an event that was a simple febrile seizure. Febrile seizures by definition are relatively brief, come on in a defined fashion, and do not involve any interference with providing oxygen to the brain. If they have a bad seizure & get brain damage, it is a seizure disorder.