Electroencephalogram — Patient information · Ruqelo Health
Diagnostics·Diagnostics
Electroencephalogram
Ruqelo Health — Take to your appointment
Educational summary — not medical advice. Discuss with your healthcare provider.
Informed by recognized medical guidance
Overview
An electroencephalogram (say eh-LEK-tro-en-SEF-uh-lo-gram), also called an EEG, is a safe and painless test that records the electrical activity of your brain. It uses small sensors on your scalp to measure your brain's natural signals, helping doctors understand how your brain is working.
Key facts
EEG is painless and does not use any needles or radiation.
It is often used to diagnose seizures, epilepsy, sleep disorders, and other brain conditions.
The test usually takes between 30 and 60 minutes, and you can go home right after.
EEG is a very common test in hospitals and clinics around the world. It is a standard tool for diagnosing brain-related conditions.
Anyone can need an EEG at any age—from newborns to older adults. It is most often used for people with symptoms that may involve the brain, such as seizures, fainting, or unexplained confusion.
Symptoms
Questions about this article
Call emergency services immediately if you notice:
A seizure that lasts longer than 5 minutes
Multiple seizures in a row without waking up in between
The person stops breathing or turns blue during a seizure
After a seizure, the person does not wake up or seems very confused for a long time
See a doctor urgently (same day) if you notice:
⚠A first-time seizure (even if it stops quickly)
⚠A seizure that is different from the person's usual pattern
⚠If the person has trouble breathing or is injured during a seizure
⚠If the person is pregnant and has a seizure
Common symptoms
Recurring seizures or convulsions (uncontrolled shaking movements)
Brief staring spells or loss of awareness
Unexplained fainting or passing out
Repeated unusual movements or behaviors that come and go
Persistent confusion or memory problems that are not getting better
Symptoms in children
Frequent staring spells that look like daydreaming
Sudden, uncontrolled movements of the arms or legs
Times when the child seems to 'space out' and does not respond
Unusual behavior changes that come and go, like sudden crying or laughing without reason
Symptoms in older adults
New or worsening confusion that comes and goes
Unexpected falls without a clear cause
Changes in memory or thinking that are not normal for their age
Episodes of blank staring or suddenly becoming unresponsive
Causes
Main causes
An EEG is done to find the cause of symptoms like seizures, not because of a single cause itself. Common conditions that lead to an EEG include epilepsy, head injury, brain infections (like encephalitis), sleep disorders, and brain tumors.
It can also be used to check brain activity after a stroke or in people with dementia.
Risk factors
Having a family history of epilepsy or seizures
A previous head injury, especially if it caused a concussion
Infections that affect the brain, like meningitis
Conditions like brain tumors or abnormal blood vessels in the brain
Sleep deprivation or alcohol withdrawal, which can trigger seizures
When to see a doctor
See a doctor urgently if:
If you have a seizure for the first time at any age
If you or your child has a seizure that lasts more than a few minutes or repeats quickly
If you lose consciousness or fall without a clear reason
If you hit your head and then have any seizure or confusion
Book a routine appointment if:
If you have been referred by a doctor for an EEG to investigate ongoing symptoms such as staring spells, unusual sensations, or memory changes
If you already have a diagnosis (like epilepsy) and need a routine EEG to check your brain activity
If you have sleep problems and your doctor suspects a sleep disorder
An EEG is a very safe test. No electricity enters your brain, and it does not cause pain or harm. You can eat, drink, and take your regular medications unless your doctor tells you otherwise. The results help your healthcare team make a clearer plan for your care.
Diagnosis
An EEG is usually done by a trained technician or a doctor who specializes in brain function. Small, flat metal discs (called electrodes) are placed on your scalp with a special gel or paste. These electrodes pick up the natural electrical signals from your brain and record them on a computer.
Tests that may be done
Routine EEG (takes about 30-60 minutes, you lie still with your eyes closed)
Sleep EEG (done while you nap or after staying up late, to capture brain activity during sleep)
Ambulatory EEG (you wear a portable recording device for 24 hours or longer, so you can go home and do your normal activities)
What to expect at your appointment
Before the test, your technician or doctor will explain what will happen. You will be asked to relax in a comfortable chair or lie on a bed. The electrodes are applied with a gentle paste, and you may be asked to breathe deeply, look at a flashing light, or close your eyes. The test is painless. You may feel a little sticky from the gel, but it washes out easily. After the test, you can go back to your normal day.
Treatment
An EEG itself is not a treatment—it is a diagnostic tool. The results help your doctor understand what is happening in your brain and choose the right treatment for the underlying condition. Treatment depends entirely on what the EEG shows and on your overall health.
Self-care at home
Keep a diary of any symptoms, such as when they happen, how long they last, and what you were doing before.
Follow your doctor's advice about sleep: some EEGs require you to sleep less the night before to capture sleep brain activity. Do not drive until your doctor says it is safe.
Avoid alcohol, caffeine, or recreational drugs if your doctor advises, as they can affect brain activity.
Medical treatments
If your EEG shows signs of epilepsy or another condition, your doctor may recommend medications to control seizures or other symptoms. These medications are chosen based on the type of brain activity seen. Always take your medications exactly as prescribed and talk to your doctor before making any changes. Other treatments may include lifestyle adjustments, physical therapy, or further tests to pinpoint the cause.
When is surgery considered?
Surgery is rarely needed but may be an option for people with certain types of epilepsy that do not improve with medications. Your doctor will discuss this in detail if it applies to your situation.
Living with this condition
For most people, an EEG is a one-time test, and you can continue your normal activities right away. If you have a condition like epilepsy, you may need repeat EEGs over time to monitor your brain activity. Your healthcare team will guide you on safety, such as driving restrictions and what to do if a seizure occurs.
Lifestyle tips
Get enough sleep and keep a regular sleep schedule—lack of sleep can trigger seizures in some people.
If you have seizures, take precautions at home like using a bathtub instead of a pool, and avoid heights or unsupervised swimming.
Wear a medical alert bracelet if your doctor recommends it, so that others know you have a seizure condition.
Keep a seizure diary to track triggers, frequency, and recovery.
Diet and exercise
A healthy, balanced diet and regular exercise are good for overall brain health. Some people with epilepsy may benefit from a special diet, such as the ketogenic diet, but only under the guidance of a doctor or dietitian. Always stay hydrated and avoid overexertion if you feel unwell.
Mental health and emotional wellbeing
Learning that you need an EEG or receiving a diagnosis can be stressful. It is normal to feel anxious, worried, or overwhelmed. Your emotions are important—talk to your doctor, a counselor, or a trusted person about how you feel. You are not alone, and support is available.
Prevention
An EEG is a test, so it does not need to be prevented. However, some conditions that lead to an EEG, like head injuries, can be reduced by wearing helmets during sports or using seatbelts. Taking care of your overall health—including getting treatment for infections early—may help lower some risks.
Vaccines
Some vaccines can prevent brain infections (like meningitis) that might cause symptoms requiring an EEG. Talk to your doctor about recommended vaccinations for you and your family.
Screening programmes
EEG is not used as a routine screening test for people without symptoms. It is only done when there is a specific reason, such as symptoms that suggest a brain condition.
Complications
If left untreated
If the underlying condition (like epilepsy) is not treated, seizures may become more frequent or more severe.
Untreated seizures can lead to injury from falls, accidents, or prolonged seizures that require emergency care.
Some brain conditions, if left untreated, can cause long-term memory or thinking problems.
Long-term outlook
With the right diagnosis and care, many people with conditions found on an EEG can live full, active lives. The EEG itself is safe and has no lasting effects. Early and proper treatment often leads to good control of symptoms, and many people with epilepsy become seizure-free with treatment. Your healthcare team is there to support you every step of the way.
Find support
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 8, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
