Early Warning Signs of Epilepsy in Adults

Parenting does not stop when a child turns 18. When your adult child, or another loved one, begins having unexplained episodes of confusion, staring, unusual sensations, memory gaps, or nighttime movements, your instincts may tell you that something is not quite right.

The challenge is that epilepsy does not always look the way people expect.

Many of us picture a seizure as someone suddenly falling, losing consciousness, and experiencing forceful shaking. That can happen, but seizures can also be surprisingly subtle. An adult may remain awake while experiencing an unusual smell, a wave of fear, tingling in one arm, or a brief inability to respond. Other episodes may look like daydreaming, clumsiness, confusion, or forgetfulness.

Recognizing the early symptoms of epilepsy in adults can help families seek medical attention sooner, document potentially important patterns, and support an accurate diagnosis.

What Is Epilepsy?

Epilepsy is a neurological condition involving a persistent tendency to have seizures. A seizure occurs when abnormal electrical activity temporarily disrupts normal brain function.

How a seizure looks depends on where it begins in the brain, which brain networks become involved, and whether awareness is affected. Symptoms may involve movement, sensation, memory, emotions, behavior, or consciousness.

It is important to understand that having one seizure does not always mean a person has epilepsy. According to the Epilepsy Foundation, a seizure can be provoked by factors such as very low blood sugar, high fever, alcohol withdrawal, certain medications, infection, or another acute medical problem. Epilepsy is generally associated with recurrent, unprovoked seizures, although it may sometimes be diagnosed after one unprovoked seizure when testing indicates a high risk of another.

Because many other medical conditions can resemble seizures, diagnosis should be made by a qualified healthcare professional.

Epilepsy Can Begin in Adulthood

Some people assume epilepsy always begins during childhood. In reality, a person can experience a first seizure at any age.

Adult-onset seizures may be associated with:

• A previous traumatic brain injury

• Stroke or other blood-vessel conditions

• Brain infections

• Brain tumors or structural abnormalities

• Neurodegenerative conditions

• Genetic factors

• Sleep deprivation

• Metabolic or immune-related conditions

In many cases, a specific cause is not immediately identified.

Older adults have an increased risk of developing epilepsy, but younger and middle-aged adults can develop it as well. That is why a new episode of unexplained loss of awareness, unusual behavior, or involuntary movement should never be dismissed simply because the person has no childhood history of seizures.

Early Warning Signs of Epilepsy in Adults

The first signs of epilepsy are not always dramatic. Families may notice small, recurring episodes before realizing they could be neurological.

One isolated symptom does not prove that someone has epilepsy. The pattern matters. Episodes that occur suddenly, last for a similar amount of time, and look or feel much the same each time deserve medical attention.

1. Brief Staring or Unresponsive Episodes

An adult may suddenly stop speaking, stare into space, or fail to respond for several seconds or minutes. Afterward, they may resume their activity without realizing anything happened.

These episodes are sometimes mistaken for:

• Daydreaming

• Distraction

• Hearing problems

• Fatigue

• Rudeness or disinterest

• Memory difficulties

Family members may be the first to recognize that the person is not simply distracted. During the episode, they may not respond to their name or remember what occurred.

2. Sudden Confusion or Memory Gaps

A person may appear confused about where they are, what they were doing, or what someone just said. They may ask the same question repeatedly or discover that several minutes have passed without a clear memory.

After some seizures, a period of confusion, exhaustion, headache, or difficulty speaking can occur. This is known as the postictal period. Depending on the seizure, it may last minutes or longer.

Not every memory lapse is a seizure, of course. Stress, poor sleep, medication side effects, migraines, and many medical conditions can affect memory. Recurrent, abrupt episodes are what make neurological evaluation especially important.

3. Repetitive, Automatic Movements

Some focal seizures cause movements that appear purposeful but occur without full awareness. These are sometimes called automatisms.

Examples include:

• Lip smacking

• Chewing motions

• Repeated swallowing

• Picking at clothing

• Rubbing the hands

• Fumbling with nearby objects

• Walking without an obvious purpose

• Repeating the same word or phrase

The person may not respond normally during the episode and may have no memory of it afterward.

4. Unexplained Sensory Experiences

Focal aware seizures can produce unusual sensations while the person remains conscious. According to the Epilepsy Foundation, symptoms may include abnormal sensations, nausea, visual changes, unusual smells, or shaking limited to one part of the body. These experiences tend to be similar each time they happen.

Possible warning signs include:

• Smelling an odor that is not present

• Experiencing a strange taste

• Seeing flashing lights or visual distortions

• Hearing sounds that others do not hear

• Tingling or numbness

• A rising sensation in the stomach

• Sudden nausea without an obvious cause

• Feeling detached from the surroundings

• A strong sense of déjà vu

These symptoms are easy to dismiss when they happen once. Repeated episodes with a similar beginning and duration should be documented and discussed with a specialist.

5. Sudden, Intense Emotions

A seizure affecting certain areas of the brain may cause a sudden wave of fear, panic, dread, joy, or another emotion that does not match the situation.

For example, an adult may abruptly feel terrified while sitting safely at home, only for the feeling to disappear a short time later. These episodes can be confused with panic attacks or anxiety.

Mental health conditions are common and deserve appropriate care, but not every sudden emotional episode is psychological. When emotional changes are brief, stereotyped, and accompanied by unusual sensations, loss of awareness, or confusion, a neurological evaluation may be warranted.

6. Unexplained Muscle Jerks or Body Movements

Quick, shock-like muscle jerks are called myoclonic movements. They may affect the arms, shoulders, legs, or entire body.

A person may:

• Drop a phone or coffee cup

• Knock something over

• Suddenly throw an arm outward

• Experience repeated jerks shortly after waking

• Lose balance without knowing why

An occasional muscle twitch is common and does not necessarily indicate epilepsy. Repeated, abrupt movements, particularly when they occur at similar times or alongside other symptoms, should be reported to a healthcare provider.

7. Episodes of Stiffening, Falling, or Shaking

Some seizures cause the body to stiffen, muscles to jerk rhythmically, and awareness to be lost. Breathing may temporarily sound unusual, and the person may feel exhausted, sore, confused, or embarrassed afterward.

These seizures are generally easier to recognize, but families may still be uncertain about what occurred—particularly if the event happened during sleep or no one witnessed the beginning.

A first convulsive seizure requires prompt medical evaluation.

8. Unexplained Injuries or Lost Time

Sometimes the evidence of a seizure appears after the event. An adult may wake or regain awareness with:

• A bitten tongue

• Unexplained bruises

• A head injury

• Wet clothing or bedding

• Sore muscles

• Broken objects nearby

• No memory of how they reached a location

• A gap in a conversation or activity

Unexplained car accidents, falls, burns, or other injuries may also raise concern about impaired awareness.

If your loved one reports “losing time,” finding themselves somewhere without remembering how they got there, or repeatedly sustaining unexplained injuries, encourage them to seek medical care.

Warning Signs of Seizures During Sleep

Some seizures happen primarily or exclusively during sleep. Because family members may not witness them, nighttime seizures can go undetected.

Possible warning signs include:

• Repeated jerking or stiffening during sleep

• Sudden awakening with confusion or fear

• Unexplained shouting or unusual vocalizations

• Falling out of bed

• Tongue biting

• Loss of bladder control

• Unexplained morning injuries

• Waking with severe muscle soreness

• Morning headaches or extreme fatigue

• Bedding that is unusually disarranged

Night terrors, sleepwalking, REM sleep behavior disorder, sleep paralysis, and other sleep conditions can sometimes resemble seizures. The reverse is also true: nighttime seizures may be mistaken for ordinary sleep behavior.

This overlap is one reason an evaluation that considers both neurological and sleep-related causes can be valuable.

What Is Post-Traumatic Epilepsy?

Post-traumatic epilepsy refers to recurrent, unprovoked seizures that develop after a traumatic brain injury. Seizures may begin relatively soon after an injury or develop months or years later.

Not everyone who sustains a concussion or traumatic brain injury will develop epilepsy. Risk depends on several factors, including the location and severity of the injury, whether bleeding or structural damage occurred, and whether seizures happened shortly after the trauma.

Adults with a history of head injury should tell their healthcare provider about:

• The date and cause of the injury

• Loss of consciousness

• Brain bleeding or skull fracture

• Hospitalization or surgery

• Seizures near the time of the injury

• Ongoing headaches, memory problems, or sleep disruption

• New episodes of staring, confusion, unusual sensations, or lost time

Effective post-traumatic epilepsy management begins with determining whether new symptoms are truly seizures, identifying the seizure type, and understanding how the previous injury may be contributing.

Management may include medication, EEG monitoring, imaging, sleep evaluation, lifestyle recommendations, safety planning, and ongoing follow-up.

How Sleep and Epilepsy Affect One Another

Sleep and epilepsy have a complicated, two-way relationship. Seizures can disrupt sleep, and inadequate or fragmented sleep may increase seizure susceptibility in some people. Certain seizures occur mainly during particular stages of sleep, while sleep disorders can cause movements or behaviors that resemble seizures.

Common sleep-related concerns among people being evaluated for epilepsy include:

• Insomnia

• Irregular sleep schedules

• Sleep deprivation

• Excessive daytime sleepiness

• Obstructive sleep apnea

• Unusual nighttime movements

• Medication-related fatigue

A person who snores loudly, gasps during sleep, wakes frequently, or remains exhausted during the day may benefit from an evaluation for an underlying sleep disorder. Addressing sleep health can be an important part of a broader seizure-management plan.

How Is Epilepsy Diagnosed?

There is no single test that answers every question about a suspected seizure. Diagnosis usually begins with a detailed medical history and description of the episodes.

A specialist may ask:

• What happened before, during, and after the event?

• How long did it last?

• Was the person aware and able to respond?

• Did one part of the body move first?

• Were there unusual sensations or emotions?

• Was the person confused or exhausted afterward?

• Has the same type of event happened before?

• Is there a history of head injury, stroke, infection, or neurological illness?

• How much sleep did the person get?

• Were alcohol, medications, illness, or metabolic changes involved?

Testing may include:

Electroencephalogram: An electroencephalogram, or EEG, records the brain’s electrical activity. It may detect patterns associated with an increased tendency to have seizures.

A normal routine EEG does not always rule out epilepsy because abnormal activity may not occur during the recording. Depending on the symptoms, a specialist may recommend a sleep-deprived EEG, ambulatory EEG, extended monitoring, or video EEG.

Brain Imaging: Magnetic resonance imaging may be used to look for structural changes, previous injury, stroke, tumors, or other abnormalities that could be associated with seizures.

Laboratory Testing: Blood tests may help identify metabolic problems, infections, medication effects, or other conditions that can provoke a seizure.

Sleep Evaluation: When episodes happen at night, or when sleep disorders may be contributing, a sleep-focused evaluation with a sleep specialist can help distinguish seizures from other nighttime behaviors.

What Should a Family Member Record?

A witness’s description can be extremely valuable because the person experiencing a seizure may not remember it.

If it is safe to do so, record:

• The time the episode began and ended

• What the person was doing beforehand

• Whether they responded to their name

• Which part of the body moved first

• Whether the eyes or head turned to one side

• Any changes in breathing or skin color

• Repetitive movements

• How long confusion or fatigue lasted afterward

• Possible triggers, including missed sleep, illness, or missed medication

A video may help the medical team understand what occurred, but only record if the person is already safe. Protecting them from injury takes priority.

What to Do If Someone Has a Seizure

Stay calm and remain with the person. If the person falls or experiences a convulsive seizure:

• Ease them to the ground if possible.

• Move hard or sharp objects out of the way.

• Place something soft beneath their head.

• Turn them gently onto one side to help keep the airway clear.

• Loosen tight clothing around the neck.

• Time the seizure.

• Stay with them as they recover.

Do not hold the person down. Do not place anything in their mouth. A person cannot swallow their tongue, and putting an object between their teeth can cause injury.

Call 911 if:

• The seizure lasts five minutes or longer.

• Another seizure begins before the person fully recovers.

• The person has difficulty breathing or waking afterward.

• The seizure happens in water.

• A serious injury occurs.

• The person is pregnant or has another concerning medical condition.

• It is the person’s first known seizure.

These recommendations are consistent with current CDC seizure first-aid guidance.

When to Schedule an Epilepsy Evaluation

An adult should receive medical evaluation after a first suspected seizure. An appointment is also important when someone experiences recurring episodes of:

• Staring or unresponsiveness

• Lost time

• Unexplained confusion

• Repetitive movements

• Sudden sensory changes

• Unexplained falls or injuries

• Nighttime stiffening or shaking

• Tongue biting

• New symptoms following a head injury

Families searching for epilepsy specialists in Austin or epilepsy specialists in Houston should look for care that offers a careful neurological assessment and appropriate diagnostic testing.

When comparing epilepsy treatment centers in Houston, it can also be helpful to ask whether the team evaluates sleep disorders, nighttime events, previous head injuries, and other conditions that can affect seizure diagnosis and control.

Take Unexplained Episodes Seriously

An unusual smell, a few seconds of staring, or a brief memory gap may not seem urgent on its own. But when episodes recur in a recognizable pattern, they may be the brain’s way of signaling that something needs attention.

Early evaluation can help determine whether the symptoms are caused by epilepsy, a sleep disorder, a heart condition, medication effects, migraines, or another medical issue. Just as importantly, it can help an adult and their family create a plan for treatment and safety.

Comprehensive Sleep Medicine Associates provides epilepsy, EEG, sleep, and neurological services for patients in the Austin and Houston areas. CSMA’s team evaluates obvious seizures as well as subtle episodes, nighttime events, and symptoms that may develop following a traumatic brain injury.

If you have noticed possible symptoms of epilepsy in your adult child or another loved one, schedule an appointment with CSMA. A comprehensive evaluation can provide answers, guide appropriate treatment, and help your family move forward with greater confidence.

Frequently Asked Questions About Epilepsy in Adults

1. What are the first symptoms of epilepsy in adults?

Early symptoms may include brief staring, loss of awareness, memory gaps, sudden confusion, unusual smells or tastes, déjà vu, tingling, repetitive movements, or unexplained muscle jerks. Some people first experience a convulsive seizure. Symptoms vary depending on where the seizure begins in the brain.

2. Can epilepsy suddenly develop in adulthood?

Yes. Epilepsy can begin at any age, including adulthood. Possible causes include head injuries, strokes, infections, structural brain changes, genetic factors, and neurodegenerative conditions. In some adults, no specific cause is identified.

3. Does one seizure mean a person has epilepsy?

Not necessarily. A single seizure can be provoked by an acute medical issue such as low blood sugar, infection, alcohol withdrawal, or medication effects. Epilepsy is generally associated with an ongoing tendency to experience unprovoked seizures. A specialist must consider the circumstances, medical history, imaging, and EEG findings.

4. Can a person remain conscious during a seizure?

Yes. During a focal aware seizure, the person remains conscious but may experience involuntary movement, tingling, visual changes, nausea, an unusual smell, or a sudden emotion. Because awareness is preserved, the person may remember the entire episode.

5. Can staring spells be a sign of epilepsy in adults?

They can be. A seizure-related staring episode may involve an abrupt pause, lack of response, repetitive movements, and no memory of what occurred. Daydreaming, fatigue, medication effects, and other medical conditions may produce similar behavior, so recurring episodes should be professionally evaluated.

6. What does a nighttime seizure look like?

A nighttime seizure may cause stiffening, rhythmic jerking, unusual sounds, sudden awakening, confusion, tongue biting, loss of bladder control, or falling out of bed. Morning injuries, headaches, muscle soreness, or extreme fatigue may also provide clues. Several sleep disorders can resemble seizures, making accurate testing important.

7. Can a head injury cause epilepsy years later?

Yes. Post-traumatic epilepsy can develop after a traumatic brain injury, and seizures do not always begin immediately. The risk varies according to the nature and severity of the injury. New episodes of lost awareness, confusion, or involuntary movement should be evaluated even if the injury occurred months or years earlier.

8. Can poor sleep trigger a seizure?

Sleep deprivation may increase seizure susceptibility in some people. Sleep disorders can also fragment sleep and complicate seizure control. Maintaining a consistent sleep schedule and addressing conditions such as obstructive sleep apnea may be important parts of an individualized treatment plan.

9. Can an EEG rule out epilepsy?

Not always. An EEG may detect abnormal electrical patterns associated with epilepsy, but a routine EEG can be normal between seizures. If symptoms remain concerning, a specialist may recommend additional testing such as a sleep-deprived EEG, ambulatory EEG, or extended video EEG monitoring.

10. When should someone call 911 for a seizure?

Call 911 when a seizure lasts five minutes or longer, another seizure begins before the person recovers, breathing becomes difficult, the event happens in water, a serious injury occurs, or the person does not return to their usual state. Emergency help is also generally recommended for a first known seizure.