Fever and fever-related epilepsies
Related Experiment Video
Updated: May 19, 2026

A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy
Published on: July 12, 2021
1UCL-Institute of Child Health, Great Ormond Street Hospital for Children NHS Foundation Trust, London and Young Epilepsy, Lingfield, United Kingdom. h.cross@ucl.ac.uk
Insights
Febrile seizures are common in children and usually harmless. However, complex febrile seizures may indicate a higher risk for developing epilepsy later in life.
Area of Science:
- Pediatrics
- Neurology
Background:
- Febrile seizures are a frequent pediatric emergency.
- Most febrile seizures are benign and self-limiting.
- A subset of febrile seizures are complex and may have long-term implications.
Purpose of the Study:
- To review current knowledge on febrile seizures.
- To examine the link between febrile seizures and epilepsy.
- To explore associated clinical phenotypes.
Main Methods:
- Literature review of febrile seizures and epilepsy.
- Analysis of the relationship between simple vs. complex febrile seizures and epilepsy risk.
- Examination of clinical phenotypes linked to febrile seizures.
Main Results:
- Most febrile seizures do not lead to long-term issues.
- Complex febrile seizures are associated with an increased risk of epilepsy.
- Certain epilepsy syndromes share phenotypes with febrile and illness-related seizures.
Conclusions:
- While most febrile seizures are benign, complex cases warrant careful evaluation.
- The distinction between simple and complex febrile seizures is crucial for prognosis and management.
- Febrile seizures can be an early indicator of underlying epilepsy syndromes.
Abstract:
Febrile seizures are a common emergency faced by general pediatricians. They are mostly self-limiting, isolated events with no sequelae in later life. A minority are more complex. In the acute stage, there are a small number of underlying etiologies that are important to recognize in order to determine the prognosis accurately and to optimize management. There has been a long-standing debate about the relationship of early febrile seizures to the later development of epilepsy. It is now clear that this risk differs for simple and complex febrile seizures: complex febrile seizures may herald the presentation of a number of epilepsy syndromes of which febrile and illness-related seizures are part of the phenotype. This review examines the existing knowledge on febrile seizures and the various clinical phenotypes to which they are linked.
Related Concept Videos
Types of Fever
Here are the different types of fever:
Epilepsy ll: Types
Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Patterns of Fever
Increased Body Temperature
Seizures l: Introduction

