What is the most common cause of a seizure in a previously healthy child?

The most common cause of a seizure in a previously healthy child is a febrile seizure, which typically occurs in children between the ages of 6 months and 5 years. These seizures are often triggered by a rapid rise in body temperature, commonly due to infections such as viral illnesses. Febrile seizures are usually brief, lasting only a few minutes, and do not typically lead to long-term health issues.

Febrile seizures differentiate themselves from other types of seizures by their association with fever in otherwise healthy children, making them a prevalent occurrence in pediatric populations. It’s important to note that despite being concerning for parents, the vast majority of children who experience febrile seizures do not have an increased risk of developing epilepsy or other neurological disorders later in life.

Understanding febrile seizures as a common and often benign phenomenon helps caregivers respond appropriately and can alleviate anxiety about the child's health as long as there are no underlying neurological concerns.