Subtle seizures, often known as absence seizures, can be dangerous, especially when occuring during a child's formative years. These kinds of seizures, without performing an EEG study, can go completely unnoticed yet are concerning due to them causing the child to go momentarily "absent". Learn more here: https://www.biospace.com/article/new-epilepsy-research-at-baylor-college-of-medicine-provides-insight-on-absence-seizures/