A single simple febrile convulsion will usually have no effect on the child; whereas, complex febrile convulsions may be followed by sequelae that can have an effect on the child, such as triggering epilepsy. A child with fever caused by upper respiratory tract infection, bronchitis, pneumonia, etc. may have a simple febrile convulsive seizure, which will last for a shorter period of time, and will usually have no sequelae or other effects on the child. Complex febrile convulsions are also a type of febrile convulsions, the etiology of which is not clear, and may be related to viral infections, heredity and other factors, the beginning of a seizure does not mean that the seizure will not occur again in the future, complex febrile convulsions can be transformed into epilepsy in the later stages, epilepsy is a chronic systemic neurological disease, which may have an effect on the physical and mental cognition of the child. Whether or not a single febrile convulsion has an effect on the child, to go to understand the causes of febrile convulsions, there is an abnormality, please take the baby to the hospital in time.