7 Getting Diagnosed
The path to an epilepsy diagnosis can feel long and uncertain, particularly in the early stages when there are more questions than answers. Understanding what the diagnostic process involves can make the journey feel less overwhelming.
7.1 The First Appointment
The most important thing a neurologist needs at a first appointment is a detailed account of what happened. No test can fully replace a careful description of the event itself, and in many cases the history alone will point strongly toward a diagnosis. If possible, it helps to write down everything you remember before the appointment, while the details are still fresh.
The neurologist will want to understand the event from three angles: what was happening just before it, what the episode itself looked like, and what followed afterward. Before the event, they will ask whether your child was ill, sleep-deprived, stressed, or exposed to any potential triggers. During the event, they will want to know what parts of the body were affected, whether your child was aware of what was happening, how long it lasted, and whether the features changed or spread as it progressed. After the event, they will ask how long it took for your child to return to normal, and whether there was confusion, excessive tiredness, weakness, or difficulty speaking.
They will also ask about your child’s broader history: birth and early development, any previous similar episodes (even ones that seemed minor), prior head injuries or brain infections, family history of seizures or epilepsy, current medications, and sleep patterns.
If anyone captured the event on a phone, bring it to the appointment. Even a short, shaky, partial clip filmed from across the room can provide more diagnostic information than the most detailed verbal description. Do not worry about quality - any video is better than none.
7.2 What Happens After a First Seizure
Not every child who has a first seizure will immediately receive a diagnosis of epilepsy or be started on medication. The approach depends on the full clinical picture.
When a first seizure occurs in a child with a normal neurological examination, a normal EEG, and no concerning features on brain imaging, the risk of a second seizure may not be high enough to warrant starting treatment right away. In these situations, the neurologist may recommend watchful waiting rather than immediate treatment.
When a first seizure is accompanied by an abnormal EEG, a structural abnormality on MRI, a relevant family history, or features consistent with a specific epilepsy syndrome, the estimated risk of recurrence is substantially higher. In these cases, the conversation about diagnosis and treatment starts much sooner, and starting medication after even a single event may be the right decision.
This is one of the most nuanced conversations in epilepsy care, and it is one where your child’s neurologist will consider the specific circumstances carefully rather than applying a simple rule.
7.3 The Diagnostic Tests
The history and clinical examination are the foundation of the diagnosis. Testing is used to add information, refine the picture, and ideally identify the underlying cause.
The EEG is the most important test for epilepsy and will almost always be ordered early in the workup. It records the brain’s electrical activity and can detect patterns that support a diagnosis, help classify the seizure type and epilepsy syndrome, and sometimes identify where in the brain seizures are coming from, even when no seizure occurs during the recording. The EEG chapter (Chapter 8) of this handbook covers what to expect in detail.
Brain MRI provides a structural picture of the brain. A high-quality epilepsy-protocol MRI can detect subtle abnormalities - areas of abnormal cortical development, scarring, vascular malformations, or prior injury - that help explain why seizures are occurring and guide treatment decisions. This is discussed further in the brain imaging chapter (Chapter 9).
Depending on the clinical picture, the neurologist may also recommend genetic testing to look for a specific genetic cause, neuropsychological testing to evaluate learning and memory, prolonged video-EEG monitoring to capture and characterize events, or other specialized investigations. Not all of these are needed in every case - the choice of tests is guided by what is already known and what question needs to be answered next.
7.4 When the Diagnosis Is Uncertain
Sometimes there is not yet enough information to make a confident diagnosis, and that uncertainty can be one of the most difficult aspects of the early stages for families. You may hear your child’s events described as “possible seizures,” “paroxysmal events,” or “seizure-like episodes” - language that reflects genuine clinical uncertainty rather than evasiveness.
When the diagnosis is unclear, the most important thing is not to rush toward a label. Misclassifying an event - calling something a seizure when it is not, or vice versa - can lead to unnecessary treatment with real side effects, or to missed treatment for a condition that genuinely needs it. If the diagnosis remains uncertain after an initial evaluation, the neurologist may recommend video-EEG monitoring to capture a typical event so it can be studied directly, or may refer to an epilepsy specialist for a second opinion.
A second opinion is never inappropriate in this situation. Epilepsy diagnosis can be complex, and seeking the perspective of a subspecialist - a pediatric epileptologist - is a reasonable and often very helpful step.
7.5 Processing the Diagnosis
For many families, receiving an epilepsy diagnosis brings a complex mixture of feelings: relief at finally having an explanation, worry about what it means for the future, grief, and sometimes guilt. All of these responses are entirely normal. Epilepsy is a life-changing diagnosis, and it takes time to adjust.
What is worth holding onto from the beginning is that epilepsy is, for most children, a highly treatable condition. The majority achieve good seizure control, and many will outgrow their epilepsy entirely. Understanding the specific diagnosis - the seizure type, the syndrome if one can be identified, and the underlying cause - is the foundation on which a good treatment plan is built, and the chapters that follow are intended to help with exactly that.