A high body temperature causes most febrile seizures.
Usually the fevers that trigger febrile seizures are caused by a viral infection, less commonly by a bacterial infection. Viral infections such as the flu and roseola, which often are accompanied by high fever, appear to be most associated with febrile seizure.
The risk of febrile seizures may increase after some childhood immunizations, such as the diphtheria, tetanus and pertussis or measles-mumps-rubella vaccinations. A child can develop a low-grade fever after a vaccination. The fever, not the vaccination, causes the seizure.
Dec. 05, 2014
- Febrile seizures fact sheet. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/febrile_seizures/detail_febrile_seizures.htm. Accessed Nov. 3, 2014.
- Millichap JG, et al. Clinical features and evaluation of febrile seizures. http://www.uptodate.com/home. Accessed Nov. 3, 2014.
- Millichap JG, et al. Treatment and prognosis of febrile seizures. http://www.uptodate.com/home. Accessed Nov. 3, 2014.
- Chung S. Febrile seizures. Korean Journal of Pediatrics. 2014;57:384.
- Febrile seizures: Clinical practice guideline for the long-term management of the child with simple febrile seizures. American Academy of Pediatrics. http://pediatrics.aappublications.org/content/121/6/1281.full.html. Accessed Nov. 3, 2014.