Evaluation of First-Time Seizure

By Rodriguez, Diana

Seizures can be a sign of epilepsy, but they can happen for other reasons as well. Although the exact cause of a seizure can't always be pinpointed, you should always be evaluated by a doctor the first time you have a seizure. It’s important to know if you have a health condition, such as epilepsy, that needs to be treated to prevent future seizures.

Facts about seizures

When your brain's electrical system doesn't work properly, a seizure occurs. Usually, your brain cells shoot off electrical impulses in a particular way. But some factors can make those electrical impulses fire erratically and without reason, essentially resulting in a "short" in your brain that causes a seizure.

Seizures are classified by type and each has different symptoms. You may have a seizure that lasts for under a minute and causes no lasting effects, or a seizure that lasts for a few minutes and causes symptoms that last for a short time. Why the brain suddenly misfires and causes a seizure is not usually identified, except when it occurs in infants and older adults. But sometimes health conditions, such as a tumor, a brain infection, or developmental problems, may be responsible for seizures.

About 1 to 2 percent of all visits to the emergency room are because of seizures. Usually, a first seizure happens before age 25.

Types of seizures

Seizures are grouped by the area of the brain in which they occur. These are the major types of seizures:

  • Partial seizures

  • Spasms in infants

  • Absence seizures

  • Myoclonic seizures

  • Atonic seizures

  • Generalized tonic-clonic or grand mal seizures


Symptoms can vary widely based on the type and severity of the seizure. These are common symptoms:

  • Staring blankly

  • Repeating motions, such as smacking your lips

  • Uncontrollable movement of the eyes

  • Loss of consciousness

  • Convulsions and jerking

  • Tremors or twitching

  • Confusion

Diagnosing the seizure

Your doctor will first make sure that you're getting enough oxygen, that all of your vital signs are normal and healthy, and that there are no signs that the seizure is still happening. The primary goal of the medical evaluation is to figure out if your symptoms were actually caused by a seizure and, if so, why the seizure occurred.

To make a diagnosis, your doctor may perform or order:

  • Complete neurological exam

  • Blood work and other lab tests to look for abnormalities in blood glucose and other factors

  • Imaging tests of the brain, such as an MRI scan

  • Electroencephalography, to test your brain's electrical activity

Your doctor will also ask a series of questions to find out if any of these factors may be responsible for the seizure:

  • Drug or alcohol use

  • Injury to the head

  • High fever or infection

  • Genetic abnormality


Seizures can be treated in several ways. These are common treatments:

  • A special low-carbohydrate diet called the ketogenic diet (often suggested for children)

  • Medications to control electrical activity in the brain

  • Surgery to repair abnormalities in the brain

  • Vagus nerve stimulation, which delivers electrical impulses to the brain

Calling the doctor

Any time a child or an adult has a seizure, call your doctor for an evaluation. Your doctor may be able to find a health problem or abnormality that caused the seizure and recommend appropriate treatment.


Seizures can happen at any time. If you're driving, operating a dangerous machine, or standing at the top of a staircase, you could be seriously injured during your seizure.

Key points to remember

Although seizures usually aren't serious, that doesn't mean that they don't need to be evaluated by a doctor. Seizures can often be successfully treated so that they don't interfere with your life.http://staging.mm-health.com/cms/content/edit.jsp?typeId=&templateId=a8251810-c590-11df-bfbf-12313b0204f1

Medical Reviewer: Bass, Pat F. III, MD, MS, MPH, Cutter, Darren MD Last Annual Review Date: 2011-01-24T00:00:00-07:00 Copyright: © 2000-2011 Krames StayWell, 780 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

Your Guide to Epilepsy

Take a Personalized Health Test

Did You Know?

View Source

Epilepsy affects as many people as multiple sclerosis, Parkinson's disease, and cerebral palsy combined. It creates an estimated $15.5 billion in medical costs and lost earnings and production each year.