Most people picture seizures as the dramatic shaking they’ve seen in movies. Reality is more varied. Knowing the different forms helps you recognize a seizure in progress and describe it accurately to the ER team.
Generalized Tonic-Clonic Seizure (“Grand Mal”)
The most recognizable type. The full body becomes rigid, then jerks rhythmically for seconds to minutes. The person loses consciousness, may bite their tongue, may lose bladder or bowel control, and is briefly not breathing normally. Afterward, they’re confused, deeply tired, and gradually return to themselves over 15 minutes to several hours.
Focal Seizure (Partial Seizure)
Begins in one specific area of the brain. May involve:
- Twitching or jerking of one arm, leg, or part of the face
- Sudden strange sensations, tingling, a rising feeling in the stomach, déjà vu
- Unusual smells or tastes
- A blank stare or staring spell with no response when spoken to
- Lip-smacking, picking at clothes, or repetitive movements with no awareness of doing them
Focal seizures may or may not spread into a full-body convulsion. Even without convulsions, they are still seizures and still need evaluation.
Absence Seizure
Most common in children. A brief staring spell of a few seconds during which the person is unresponsive and unaware. They may look like they’re daydreaming. Often missed at first.
Status Epilepticus, A Medical Emergency
Any seizure lasting more than 5 minutes, or multiple seizures in a row without the person regaining full awareness in between. This is a life-threatening condition. Call 911 immediately.
Post-Seizure (Postictal) State
After the seizure ends, the person typically enters a recovery phase that can last minutes to hours. They may be confused, sleepy, weak on one side, have a headache, or be unable to remember the seizure at all. This is normal, but in someone with no seizure history, the underlying cause still needs immediate evaluation.
2. The Main Emergency Causes of a First-Time Seizure
In people without prior epilepsy, seizures are almost always caused by an underlying medical problem. The major categories all require ER evaluation, and several are immediately life-threatening if not identified.
Category 1, Structural Brain Causes
Anything that physically affects the brain can trigger a seizure:
- Stroke (both ischemic and hemorrhagic), the most common cause of new-onset seizures in adults over 50
- Brain tumor or brain abscess
- Head injury, acute or from weeks ago
- Brain bleed (subdural, epidural, or subarachnoid hemorrhage)
- Brain infection, meningitis or encephalitis
- Brain malformations or scars from prior injury
Category 2, Metabolic and Electrolyte Causes
The brain is exquisitely sensitive to chemistry changes. Many seizures in the ER turn out to be triggered by metabolic problems:
- Severe low blood sugar (hypoglycemia), especially in diabetics
- Very high blood sugar with diabetic ketoacidosis
- Low sodium (hyponatremia), common in older adults, athletes, and certain medications
- Low calcium or magnesium levels
- Kidney or liver failure causing toxin buildup
- Severe dehydration
Category 3, Toxic and Withdrawal Causes
Drugs, alcohol, and certain medications can lower the seizure threshold or trigger seizures directly:
- Alcohol withdrawal, particularly 6 to 48 hours after stopping heavy drinking
- Benzodiazepine or sleeping pill withdrawal
- Opioid overdose or withdrawal
- Recreational drug use (cocaine, methamphetamine, synthetic cannabinoids)
- Certain medications, particularly some antidepressants, antibiotics, and pain medications
- Carbon monoxide poisoning
- Heavy metal exposure
Category 4, Infectious Causes
Infections can cause seizures through direct brain involvement or through high fevers:
- Meningitis (brain lining infection)
- Encephalitis (brain tissue infection)
- Severe sepsis, body-wide infection response
- High fever, especially in children (febrile seizures)
Category 5, Pregnancy-Related Causes
Pregnancy adds a unique category of seizure causes:
- Eclampsia, seizures from severely high blood pressure in pregnancy or postpartum
- Cerebral venous thrombosis (clots in brain veins, more common in pregnancy)
Any new seizure in a pregnant or recently postpartum patient is an immediate 911 call.
Category 6, Pediatric-Specific Considerations
Children have some seizure causes adults don’t share:
- Febrile seizures, triggered by high fevers in children ages 6 months to 5 years
- Genetic or congenital seizure disorders presenting for the first time
- Birth-related brain injuries that become symptomatic later
- Inherited metabolic disorders
Most febrile seizures are not dangerous, but a first one always needs evaluation to confirm the diagnosis and rule out brain infection.
Key point: you cannot identify the cause at home. Treatment for each category is different, sometimes opposite. The ER evaluation pinpoints the cause through CT imaging, blood work, and a focused exam, and starts the right treatment from there.
3. Red Flags That Make a Seizure an Immediate 911 Call
A first-time seizure is always an emergency. These red flags raise the urgency even further and confirm that 911, not driving yourself, is the right move.
Call 911 Immediately If
- It’s the first seizure the person has ever had
- The seizure lasts more than 5 minutes (status epilepticus)
- A second seizure follows the first without full recovery in between
- The person is not breathing normally during or after the seizure
- The person doesn’t fully wake up within 15 to 30 minutes
- The seizure happened in water (bathtub, pool, lake), aspiration risk
- Injury occurred, head trauma, deep cut, suspected broken bone
- The person is pregnant or recently gave birth
- The person is diabetic, has heart disease, or is on blood thinners
- Fever is present, especially with stiff neck, vomiting, or severe headache
- There’s a history of recent head injury, even a minor one
- Suspected overdose, poisoning, or alcohol/drug withdrawal
Why Even “Mild” First Seizures Are Emergencies
In someone with no known epilepsy, even a brief, self-limited seizure is the visible tip of an underlying problem, stroke, infection, metabolic crisis, or something else identifiable on workup. The seizure itself may have stopped, but the cause hasn’t been treated. Without ER evaluation, the next seizure may not be brief, and the underlying condition may progress.
⚠ EMERGENCY: First-ever seizures are 100% an ER visit, even if the person has fully recovered. The cause needs to be identified before the next one happens.
4. Seizure First Aid, What to Do During and After
If you witness a seizure, what you do in the first few minutes matters. Several widely believed “first-aid” actions are actually wrong and can hurt the patient. Here’s the right approach, based on Epilepsy Foundation guidance.
During the Seizure
Step 1, Stay Calm and Note the Time
Look at a clock or start a timer. Knowing exactly how long the seizure lasts is one of the most important pieces of information for the ER team. Anything over 5 minutes is status epilepticus, call 911 immediately.
Step 2, Make the Area Safe
- Move sharp or hard objects away from the person
- Clear furniture they could hit
- If they’re on a hard floor, slide something soft under their head (folded jacket, pillow, your hand)
- Loosen tight clothing around the neck
Step 3, Do NOT Restrain or Hold Them Down
Restraining a seizing person can cause injury to them or to you. The shaking will stop on its own. Your job is to keep them safe while it does, not to stop the movement.
Step 4, Do NOT Put Anything in Their Mouth
This is the most damaging myth in seizure first aid. People cannot “swallow their tongue” during a seizure. Putting fingers, spoons, or objects in their mouth can break teeth, dislocate jaws, or get you bitten. Leave the mouth alone.
Step 5, Turn Them on Their Side Once Shaking Stops
After convulsions end, gently roll the person onto their side. This keeps the airway clear and allows saliva or vomit to drain. Don’t roll them while active shaking is happening.
After the Seizure
Step 6, Stay With Them
The post-seizure phase can last anywhere from a few minutes to several hours. The person may be confused, sleepy, weak, emotional, or unable to recognize you briefly. Speak calmly and let them know they had a seizure. Don’t leave them alone.
Step 7, Don’t Give Food, Water, or Medications
Until the person is fully alert and oriented, don’t offer food or drink, choking risk is real. Don’t give over-the-counter medications hoping to help.
Step 8, Call 911 If Any Red Flag Applies
Even if the seizure has ended, call 911 if it’s the first one, lasted more than 5 minutes, repeated, caused injury, or the person isn’t recovering normally.
Step 9, Bring This Information to the ER
- How long the seizure lasted (in seconds or minutes)
- What it looked like, full body, one side, staring, etc.
- Whether breathing changed, color changed, or eyes rolled
- Any injury that occurred
- Current medications, recent dose changes, or missed doses
- Recent fever, illness, head injury, alcohol or drug use
- Family history of seizures or neurological conditions
5. How ER of Fort Worth Evaluates a First-Time Seizure
When a patient arrives after a first-time seizure, our team works through a structured evaluation designed to identify the cause quickly and prevent the next seizure.
Rapid Triage and Stabilization
Within minutes of arrival, a nurse takes vital signs, blood sugar (a critical first check because hypoglycemia is a common reversible cause), and oxygen levels. If the patient is still seizing on arrival, IV medications to stop the seizure are given immediately.
Focused Neurological and Physical Exam
A board-certified emergency physician performs a detailed neurological exam, looking for stroke signs, one-sided weakness, abnormal pupil response, and any focal neurological findings that point to a specific brain region. Physical exam also looks for tongue bites, injuries, signs of infection, or signs of substance use.
CT Imaging On-Site
A non-contrast head CT is performed to rule out stroke, brain bleeding, head injury, brain tumors, and large structural causes. CT is the first-line imaging for new-onset seizures and is available 24/7 at our facility.
Targeted Lab Work and EKG
- Blood glucose, rules out hypoglycemia
- Complete metabolic panel, sodium, calcium, magnesium, kidney and liver function
- Complete blood count and inflammatory markers
- Drug screen and alcohol level when substance involvement is possible
- Pregnancy test in women of reproductive age, eclampsia is a critical cause to identify
- EKG to identify heart rhythm disturbances that can present as seizure-like episodes
- Lumbar puncture if brain infection is suspected
Treatment and Disposition
Once the cause is identified, treatment begins on-site, IV glucose for hypoglycemia, electrolyte correction for chemistry imbalances, antibiotics for infection, blood pressure management for stroke, antiseizure medication when needed. For patients requiring hospital admission, neurology consultation, or specialized imaging (MRI, EEG), we coordinate transfer to your preferred hospital while continuing treatment.
Follow-Up Planning
Even when discharged the same visit, all first-time seizure patients receive clear instructions about driving restrictions (Texas requires a seizure-free interval before resuming driving), neurology follow-up, and what to do if another seizure occurs.
Frequently Asked Questions
Is one seizure enough to be diagnosed with epilepsy?
Not necessarily. Epilepsy is generally diagnosed after two or more unprovoked seizures, or after one seizure if testing shows a high risk of more. A first-time seizure with an identifiable cause (like low blood sugar or alcohol withdrawal) is treated as a provoked event, not epilepsy. The ER workup helps determine which situation applies.
Should I drive my loved one to the ER after a first seizure?
Call 911 instead. EMS can monitor the patient on the way, restart treatment if a second seizure occurs, and route them appropriately. If you must drive, and the patient is fully alert and recovered, keep them in the front seat with the seatbelt loosened, and never let them drive themselves.
Why can’t I put something in their mouth during a seizure?
Because the “swallowing your tongue” idea is a myth. Anatomically, you cannot swallow your own tongue. Putting objects in someone’s mouth during a seizure breaks teeth, dislocates jaws, and gets fingers bitten. Leave the mouth alone.
How long do post-seizure confusion and tiredness usually last?
Typically 15 minutes to several hours, though most people are back to baseline within a day. If confusion lasts more than 30 minutes, repeats, or worsens, that needs urgent ER evaluation regardless of whether you’ve already been seen.
Can stress, sleep deprivation, or alcohol cause a first seizure?
Yes, particularly sleep deprivation and alcohol (either heavy use or withdrawal) lower seizure threshold and can trigger seizures in people who would otherwise never have one. This doesn’t mean the seizure was “just from being tired”, every first seizure still needs ER evaluation.
My child had a seizure with a fever, is this epilepsy?
Probably not. Most febrile seizures in children ages 6 months to 5 years are benign and don’t lead to epilepsy. But a first febrile seizure always needs ER evaluation to confirm the diagnosis and rule out brain infection. Bring your child in even if they seem fully recovered.
Will my insurance cover the ER visit?
Yes, under federal EMTALA law, emergency visits are covered based on presenting symptoms, not the final diagnosis. First-time seizures are unambiguously emergency presentations. We accept most major commercial insurance. We do not currently accept Medicare or Medicaid.
After a First-Time Seizure, Don’t Wait. Get Evaluated.
A seizure is the brain’s alarm system signaling that something else is wrong. The cause may be quickly reversible, or it may be life-threatening. Either way, identifying it is the only path to preventing the next one.
⚠ EMERGENCY: Active seizure, status epilepticus, or any seizure with red flags, call 911 immediately. Do not drive.
📍 Address: 4561 Heritage Trace Pkwy, Suite 117, Fort Worth, TX 76244
📞 Non-emergency line: +1 817-945-4200
🌐 Website: eroffortworthtx.com
🕐 Hours: Open 24/7, every day, every hour, every holiday
For resolved seizures, follow-up questions, or non-life-threatening concerns, walk into ER of Fort Worth at any hour or call +1 817-945-4200. On-site CT, full lab, EKG, and board-certified emergency physicians on every shift.
Medical Disclaimer
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified emergency physician or other healthcare provider with any questions regarding a medical condition. If you witness a seizure or are concerned about a medical emergency, call 911 or go to your nearest emergency room immediately.
