12 Key Signs of Seizures and How to Respond with Proper First Ai

Seizures can be sudden and alarming, often striking without warning. One of the most unsettling experiences is witnessing someone appear perfectly normal one moment, only to experience a seizure the next.

According to the Centers for Disease Control and Prevention (CDC), 1 in 10 people will have a seizure at some point in their life. While some seizures are brief and mild, others can be life-threatening, making it crucial to understand the key signs that something may be wrong.

Seizures are caused by abnormal electrical activity in the brain, and they can vary in severity. The most common form, known as generalized seizures, involves the entire brain and affects the whole body, leading to involuntary shaking and loss of consciousness.

Focal seizures, on the other hand, originate in one part of the brain and may cause subtle symptoms, such as jerking movements or confusion, which can be mistaken for something less serious.

Approximately 3.4 million people in the U.S. live with active epilepsy, the most common seizure disorder. Seizures can occur for a variety of reasons, including brain injury, infection, genetic factors, and underlying medical conditions like stroke or brain tumors.

Despite being relatively common, many people are still unsure of what to look for or how to respond when they witness someone having a seizure.

Early identification of the warning signs is critical, as it can help ensure that the person receives proper care quickly. In this article, we’ll explore 12 key signs of seizures that you shouldn’t ignore. Recognizing these symptoms early can make a huge difference in providing timely medical attention and preventing further complications.

Whether you’re a caregiver, a friend, or simply someone concerned about your health, understanding the signs of seizures can empower you to act confidently and effectively.

12 Key Seizure Signs From Subtle to Severe

Staring Spells

Often associated with absence seizures, this sign appears as a brief, sudden lapse of awareness where the person abruptly stops all activity and stares blankly into space. Their eyes may roll upward or their eyelids may flutter.

The person is unresponsive during the spell, which typically lasts for 5 to 20 seconds, and they have no memory of the event afterward. To an observer, it can look exactly like daydreaming or inattention.

Automatic Behaviors (Automatisms)

These are non-purposeful, repetitive movements that occur during a seizure when a person’s awareness is impaired. Common automatisms include lip-smacking, chewing motions, picking at clothes, fumbling with objects, or wandering aimlessly.

The person is not consciously controlling these actions and will not remember performing them. Automatisms are a hallmark of focal impaired awareness seizures, particularly those originating in the temporal lobe.

Sensory Changes (Auras)

An aura is not a separate event but is actually the beginning of a focal aware seizure. It manifests as a strange sensation that serves as a warning sign that a more significant seizure may follow. Auras vary widely and can affect any sense.

Examples include seeing flashing lights or geometric shapes (visual), hearing a buzzing or ringing sound (auditory), smelling an odd odor like burning rubber (olfactory), experiencing a strange taste (gustatory), or feeling a rising sensation in the stomach, sudden fear, or a strong sense of déjà vu (emotional/psychic).

Sudden Muscle Jerks (Myoclonic Jerks)

This sign consists of sudden, brief, shock-like jerks of a muscle or a group of muscles. They most often affect the neck, shoulders, and upper arms. The jerks can be subtle enough to look like a nervous twitch or strong enough to cause a person to spill a drink or drop an object they are holding. They are the defining feature of myoclonic seizures.

Brief Muscle Stiffness (Tonic activity)

In a tonic seizure, muscles suddenly stiffen and contract. This can affect the entire body or be localized to one area. If the person is standing, the stiffening of their leg and trunk muscles can cause them to fall stiffly, often backward. These events are very brief, usually lasting less than 20 seconds, and can be mistaken for a simple loss of balance.

Speech Arrest

This is a sudden, temporary inability to speak or form words, even though the person is aware and may be trying to communicate. They understand what is being said to them but cannot produce speech. This sign is common in focal seizures that affect the language centers of the brain, such as the left frontal or temporal lobes.

Loss of Consciousness

This is a hallmark of many generalized seizures, where the person becomes completely unaware of their surroundings and unresponsive to sound, touch, or other stimuli. This state differs from the brief lapse of awareness in an absence seizure; it is a profound unresponsiveness that can last for the duration of the seizure, which may be several minutes.

Convulsions (Tonic-Clonic Movements)

This is the most widely recognized seizure sign. It occurs in a tonic-clonic seizure (formerly known as a “grand mal” seizure) and has two distinct phases. The first is the tonic phase, where the body’s muscles become rigid and stiff, often causing the person to fall.

This is immediately followed by the clonic phase, characterized by rhythmic, violent jerking of the limbs and body. The jaw may be clenched, and breathing can become difficult, sometimes leading to a bluish tint on the lips or skin.

Falling Suddenly (Atonic Seizures)

In direct contrast to the stiffening of a tonic seizure, an atonic seizure (or “drop attack”) involves an abrupt loss of all muscle tone. This causes the person to go limp and suddenly collapse to the ground. These seizures are extremely brief, often lasting only a few seconds, but they carry a high risk of head or facial injury from the fall.

Crying Out or Screaming

At the beginning of some tonic-clonic seizures, a person may make a loud cry or groan. This is not a sign of pain but an involuntary sound caused by air being forcefully expelled from the lungs as the chest and vocal cord muscles contract and stiffen during the tonic phase.

Loss of Bladder/Bowel Control

During the intense muscle contractions and loss of voluntary control characteristic of a severe generalized seizure, the sphincter muscles may relax, leading to incontinence. While this can be embarrassing for the individual, it is a common physiological response to the overwhelming electrical storm in the brain.

Post-Seizure Confusion (Postictal State)

This is the recovery period immediately following a seizure. It is a critical sign that a significant seizure event has occurred. The person may be disoriented, drowsy, confused, and complain of a headache or muscle soreness.

They may have no memory of the seizure itself. This postictal state can last from a few minutes to several hours, depending on the seizure’s severity and the individual.

Types of Seizures

The different signs of a seizure are caused by two primary types of seizures – focal and generalized – which are classified based on where the abnormal electrical activity originates in the brain.

The primary difference between focal and generalized seizures lies in their point of origin within the brain; focal seizures start in a single network of cells in one hemisphere, while generalized seizures begin simultaneously in networks across both hemispheres.

This distinction in origin is the fundamental reason for the vast difference in symptoms. The signs of a focal seizure are a direct reflection of the function of the brain area where the seizure starts, whereas generalized seizures produce widespread symptoms because the entire brain is affected at once.

Focal seizures originating in one specific part of the brain, the symptoms are initially localized. For example, a focal seizure in the motor cortex might cause jerking in a single limb, while one in the occipital lobe could cause visual disturbances.

Focal seizures are further divided into two sub-types based on their effect on consciousness. In a focal aware seizure, the person remains fully conscious and aware of what is happening, able to recall the event afterward. This is when signs like auras, localized muscle jerks, or speech arrest occur.

In a focal impaired awareness seizure, the person’s consciousness is affected. They may appear awake but are confused, unresponsive, and engage in automatic behaviors (automatisms). They will have no memory of the event.

Generalized seizures involve abnormal electrical activity that begins in and affects both sides of the brain simultaneously. Because the entire brain is involved from the start, they almost always cause an impairment or complete loss of consciousness. The signs are widespread and affect the whole body.

This category includes the well-known tonic-clonic seizures (convulsions), absence seizures (staring spells), myoclonic seizures (jerks), and atonic seizures (sudden falls). The simultaneous disruption of brain-wide networks is what leads to these more dramatic and severe clinical manifestations.

The Relationship Between Specific Signs and Seizure Types

Specific seizure signs are hallmark indicators of particular seizure types; for instance, staring spells define absence seizures, convulsions define tonic-clonic seizures, and brief, shock-like jerks characterize myoclonic seizures.

This direct correlation helps neurologists diagnose the underlying epilepsy syndrome and determine the most effective treatment plan. The sign is the external manifestation of the specific pattern of abnormal electrical activity in the brain.

Staring Spells and Absence Seizures

The blank, unresponsive stare is the primary and often only sign of an absence seizure. This type of generalized seizure causes a very brief interruption of all brain function, leading to a sudden lapse in consciousness without any loss of muscle tone. The person simply “checks out” for a few seconds and then returns to normal, with no memory of the missed time.

Convulsions and Tonic-Clonic Seizures

The combination of body stiffening (tonic phase) and rhythmic jerking (clonic phase) is the defining feature of a tonic-clonic seizure.

This generalized seizure type involves a massive, uncontrolled discharge of electrical activity across the entire brain, leading to the most severe motor symptoms, along with loss of consciousness, potential loss of bladder control, and a significant postictal recovery period.

Muscle Jerks and Myoclonic Seizures

Sudden, involuntary, shock-like muscle jerks are the key sign of myoclonic seizures. These generalized seizures involve very brief bursts of abnormal electrical activity that cause muscles to contract quickly. The jerks can be isolated to one part of the body or affect multiple muscle groups at once.

Sudden Falls and Atonic Seizures

An abrupt fall caused by a sudden loss of muscle tone is the primary sign of an atonic seizure. This generalized seizure causes a momentary shutdown of the brain’s ability to maintain postural control, leading the body to go limp.

Auras, Automatisms, and Focal Seizures

Sensory changes (auras) are the manifestation of a focal aware seizure, where the seizure activity is contained within the brain region responsible for that specific sense.

Automatic behaviors (automatisms) are the key sign of a focal impaired awareness seizure, where the seizure has spread to areas affecting consciousness, leaving subconscious motor pathways to generate repetitive, purposeless actions.

Correct First Aid Response When Observing Seizure Signs

The correct first aid response when observing seizure signs is centered on the principle of “Stay, Safe, Side” – stay with the person and time the seizure, keep them safe from injury by clearing the area, and turn them onto their side after convulsions stop.

This approach is designed to protect the individual from harm during the seizure and ensure their airway remains clear during the recovery period. It emphasizes compassionate observation over active intervention, as most seizures resolve on their own without medical treatment.

Safe and Helpful Actions During a Seizure

Stay Calm and Time the Seizure

Your calm presence can reassure others and help you think clearly. Start timing the seizure as soon as you notice it. The duration is a critical piece of information for healthcare providers. Note the time it starts and the time it stops. Most seizures last less than two minutes. A seizure lasting more than five minutes is a medical emergency.

Keep the Person Safe

Gently guide the person to the floor if they are standing or sitting in a chair. Move any hard or sharp objects such as furniture, glasses, or decorations away from them to prevent injury from accidental impact during uncontrolled movements. If a crowd has gathered, ask people to step back to give the person space.

Cushion Their Head

Place something soft and flat under the person’s head, like a folded jacket or a small pillow. This protects them from head injury caused by striking the floor during convulsions. Do not lift their head or try to restrain their neck.

Turn Them Gently Onto Their Side

As soon as the active convulsions stop, carefully roll the person onto their side. This is known as the recovery position. It helps keep their airway open by allowing saliva or any vomit to drain out of the mouth instead of being inhaled into the lungs, which could cause choking or aspiration pneumonia.

Loosen Tight Clothing

If there is anything tight around the person’s neck, such as a tie, a scarf, or a tight shirt collar, gently loosen it to ensure their breathing is not restricted.

Stay and Reassure

Remain with the person until the seizure is over and they are fully awake and aware. After the seizure, they will likely be confused, tired, and disoriented (the postictal state).

You are recommended to speak to them in a calm, reassuring voice. Explain what happened in simple terms and help orient them to where they are. Do not offer them food or drink until you are certain they are fully conscious and able to swallow.

Dangerous Actions to Avoid During a Seizure

The following actions are based on outdated myths and can cause serious injury to the person having the seizure. To ensure safety, you must never perform the following actions:

Do NOT Restrain the Person

Never try to hold a person down or stop their movements during a convulsive seizure.

The force of the muscle contractions is incredibly strong, and attempting to restrain them can lead to fractures, dislocations, or other soft tissue injuries for the person having the seizure, as well as potential injury to yourself. The seizure will run its course regardless of restraint.

Do NOT Put Anything in Their Mouth

This is a critical and widely misunderstood point. It is a dangerous myth that a person can swallow their tongue during a seizure. It is anatomically impossible.

Forcing anything into their mouth including your fingers, a spoon, or a wallet can cause serious harm. It can break their teeth, damage their jaw or gums, or create a choking hazard if a piece of the object breaks off.

Do NOT Give Food or Water

Do not attempt to give the person anything to eat or drink until they are fully awake, alert, and able to swallow normally. During and immediately after a seizure, their swallowing reflex is impaired, and giving them liquids or solids could cause them to choke or aspirate the substance into their lungs.

Do NOT Perform CPR

People may appear to stop breathing or turn blue during a seizure. This is usually temporary, and their breathing will typically resume on its own after the seizure ends. CPR is not necessary and should not be performed on someone having a seizure unless they do not start breathing again after the seizure has completely stopped.

Finally, it is essential to know when a seizure becomes a medical emergency. Call 911 immediately if:

• The seizure lasts for more than five minutes.
• A second seizure begins shortly after the first one ends.
• The person does not regain consciousness or normal breathing after the seizure.
• The person is injured during the seizure.
• The seizure occurs in water.
• The person is pregnant, has diabetes, or you know it is their first seizure.

Seizure Diagnosis

An official diagnosis of a seizure’s cause is a multi-step process that aims to confirm the event was a seizure and identify its underlying origin. The cornerstone of this evaluation is a thorough neurological exam and a detailed medical history, including eyewitness accounts of the event, as the patient may not remember it.

To get a clear picture of the brain’s electrical activity, an electroencephalogram (EEG) is the primary diagnostic tool. During an EEG, small electrodes are attached to the scalp to record brainwave patterns; abnormal spikes or sharp waves can indicate a predisposition to seizures.

For a more detailed look at the brain’s structure, a doctor will likely order imaging tests. A magnetic resonance imaging (MRI) scan is often used to detect structural abnormalities, such as tumors, scarring from a previous injury, or developmental issues that could be causing the seizures.

In some cases, a CT scan may be used, especially in emergency settings. Finally, blood tests are often conducted to rule out other potential causes, such as metabolic imbalances, infections, or genetic conditions that might be contributing to the seizure activity.

What Are Common Triggers That Can Provoke a Seizure?

For individuals diagnosed with epilepsy, identifying and managing personal triggers is a key component of controlling their condition. While triggers vary from person to person, several are widely recognized for their potential to provoke seizure activity. Avoiding these known stressors can significantly reduce the frequency of seizures and improve quality of life.

The most common trigger is failing to take anti-seizure medication as prescribed. Consistent medication levels in the bloodstream are essential for maintaining control over the brain’s electrical activity.

Sleep deprivation is a powerful trigger because it lowers the brain’s seizure threshold, making abnormal electrical discharges more likely. Maintaining a regular and sufficient sleep schedule is critical.

Both significant emotional stress (like grief or anxiety) and physical stress (like an illness or injury) can alter brain chemistry and trigger seizures in susceptible individuals. Also, a high fever, particularly in children, or any systemic illness can place stress on the body and brain, increasing the risk of a seizure.

Known as photosensitivity, flashing lights is relatively rare but well-known. Rapidly flashing or flickering lights, such as those in video games or strobe lights, can provoke seizures in photosensitive individuals.

Specially, excessive alcohol consumption, as well as the use of illicit drugs, can interfere with anti-seizure medication and directly impact brain function. Seizures are also a common symptom of alcohol withdrawal.

Seizure Signs vs. Stroke Signs

While both seizures and strokes are serious neurological events that require immediate medical attention, their underlying causes and typical presentations are distinctly different.

A seizure is a sudden, uncontrolled electrical disturbance in the brain, whereas a stroke is caused by an interruption of blood flow to the brain, leading to cell death. Differentiating between them is vital for providing the correct emergency treatment.

A generalized tonic-clonic seizure often begins abruptly with a loss of consciousness and full-body convulsions.

Stroke symptoms, conversely, are typically characterized by a sudden loss of function. This is often remembered by the acronym F.A.S.T.: Face drooping, Arm weakness (usually on one side), and Speech difficulty. While some strokes can trigger a seizure, convulsions are not a primary sign of a stroke itself.

Besides, seizures frequently involve positive motor signs, such as repetitive jerking, stiffening of limbs, or automatic behaviors. Strokes are defined by negative signs, meaning a loss of ability, like paralysis (hemiplegia) or numbness on one side of the body.

Most seizures are brief, lasting from a few seconds to a few minutes, and are followed by a postictal state of confusion, exhaustion, or headache as the brain recovers.

Stroke symptoms, however, are persistent and will continue until medical intervention can restore blood flow. The aftermath of a stroke involves long-term rehabilitation to regain lost function, which is fundamentally different from the postictal recovery period.

Can You Have Seizure-like Signs Without Having Epilepsy?

It is possible to experience events with signs that strongly resemble an epileptic seizure without having epilepsy or any abnormal electrical activity in the brain.

These events are often referred to as seizure mimics, and correctly identifying them is essential because their treatments are completely different from those for epilepsy. Misdiagnosis can lead to the unnecessary prescription of powerful anti-seizure medications with significant side effects.

One of the most common mimics is psychogenic non-epileptic seizures (PNES). These are physical manifestations of psychological distress or trauma and are not caused by electrical disruptions in the brain. An EEG performed during a PNES event will show normal brainwave activity.

Another common mimic is syncope, or fainting, which is a brief loss of consciousness due to a temporary drop in blood flow to the brain. During some fainting spells, a person may experience brief muscle jerking, known as convulsive syncope, which can easily be mistaken for a tonic-clonic seizure.

Other conditions that can present with seizure-like signs include complex migraines with aura, certain sleep disorders like narcolepsy with cataplexy, and movement disorders such as tics or tremors. A thorough evaluation by a neurologist, often including video-EEG monitoring, is crucial to distinguish these events from true epileptic seizures.

FAQs

1. How long do seizures last?

Seizures typically last anywhere from 1 to 3 minutes. In most cases, the episode will stop on its own without intervention. However, if a seizure lasts longer than 5 minutes, it is considered a medical emergency, known as status epilepticus.

Prolonged seizures can lead to serious complications such as brain damage or respiratory failure. Immediate medical attention is necessary for seizures that last longer than 5 minutes, or for those that occur in quick succession without recovery in between.

2. What does a seizure feel like?

The experience of a seizure can differ from person to person. Some individuals may have an aura, which is a warning sensation or feeling, such as a strange taste, smell, or visual disturbance, prior to the actual seizure. During the seizure, people often experience a loss of consciousness or awareness, muscle jerking, shaking, or convulsions.

Some people may feel intense dizziness, nausea, or visual distortions. Others may experience more subtle symptoms, like staring episodes or confusion. Afterward, many individuals feel tired, disoriented, or have difficulty remembering what happened.

3. What helps seizures go away?

Most seizures stop on their own after a few minutes without the need for intervention. However, if a seizure is prolonged or frequent, anti-seizure medications (like phenytoin, valproic acid, or levetiracetam) may be prescribed to help control and prevent them.

In emergency situations, a healthcare provider may administer benzodiazepines like diazepam to quickly stop a seizure.

Other treatments, such as a ketogenic diet, vagus nerve stimulation, or surgery, may be considered for people with chronic or hard-to-control seizures. Stress reduction, getting adequate sleep, and avoiding triggers can also help prevent seizures from occurring.

4. What are 5 foods to avoid that cause seizures?

While diet alone is unlikely to be the sole cause of seizures, certain foods can act as seizure triggers for some individuals. These foods include:

• Caffeine – Found in coffee, tea, and soda, caffeine can stimulate the nervous system and lower the threshold for seizures.
• Alcohol – Drinking excessive alcohol can disrupt brain chemistry and trigger seizures, especially during withdrawal periods.
• Processed foods – Foods containing monosodium glutamate (MSG) or artificial additives may cause hypersensitivity reactions that contribute to seizure activity.
• Refined sugars – Sudden spikes and drops in blood sugar levels can increase the likelihood of seizures, especially in individuals with diabetes or hypoglycemia.
• High-sodium foods – Excessive salt can lead to electrolyte imbalances and disrupt normal brain function, increasing the risk of seizures.

It’s important to keep track of your diet and discuss any specific triggers with a healthcare professional.

5. What are the first signs of a seizure?

The first signs of a seizure can vary depending on the type of seizure. For some individuals, the first sign may be an aura, which can include: strange smells, tastes, or visual distortions, a sense of déjà vu or unfamiliarity, sudden fear, anxiety, or dizziness or a feeling of confusion or zoning out.

For others, the first signs may be unexplained muscle twitches or staring spells. Convulsions or jerking movements are often visible during more intense seizures. Recognizing the early warning signs of a seizure is crucial, especially for people who experience epileptic auras that can warn of an impending seizure.

6. Does your brain go back to normal after a seizure?

For most individuals, the brain returns to normal after a seizure, although recovery may take some time. Immediately following a seizure, many people experience a postictal state, which can include confusion, disorientation, memory lapses, and extreme fatigue. This period can last from minutes to hours.

While the brain often recovers fully, repeated seizures can sometimes cause long-term neurological effects, especially in individuals who experience frequent seizures or status epilepticus.

If seizures are not well-controlled, over time, it could result in cognitive impairments or difficulty with motor function. Ongoing treatment and management are essential for minimizing the long-term impact on brain health.

7. What are bad signs after a seizure?

While some post-seizure symptoms are normal, there are certain bad signs that indicate the need for immediate medical attention:

• Seizures lasting longer than 5 minutes or multiple seizures in a row without regaining consciousness between them (status epilepticus).
• Severe difficulty breathing or gasping for air after a seizure.
• Persistent confusion or agitation that lasts more than an hour.
• Head injury, bleeding, or broken bones sustained during the seizure.
• Sudden personality changes, severe headaches, or persistent dizziness.

If any of these signs are present, it’s crucial to seek emergency medical care right away.

8. What are the four stages of a seizure?

Seizures can be broken down into four stages:

1. Prodromal Stage – This is the early warning phase that may include subtle changes in mood, behavior, or sensations. These symptoms can occur hours or days before the seizure.
2. Aura – Some people experience an aura, which is a pre-seizure sensation, such as visual disturbances, a strange smell, or a sense of déjà vu. Not everyone with seizures has an aura.
3. Ictal Phase – This is the actual seizure, where convulsions, loss of consciousness, or muscle spasms occur. This phase can last from a few seconds to several minutes.
4. Postictal Phase – After the seizure, the individual may experience confusion, drowsiness, memory loss, or difficulty speaking. This recovery phase can last anywhere from minutes to several hours.

9. What happens if you leave seizures untreated?

Leaving seizures untreated can result in severe complications. The risk of status epilepticus, where seizures last longer than 5 minutes or occur in quick succession without recovery, is a major concern. Prolonged or repeated seizures can cause brain damage, impair cognitive abilities, and lead to physical injuries such as falls or burns.

Untreated seizures can also severely impact quality of life, resulting in emotional distress and mental health issues like anxiety or depression. With proper treatment, seizures can often be managed effectively, reducing the risk of long-term harm.

Conclusion

Seizures can be alarming, but understanding the warning signs, treatment options, and the importance of timely medical intervention can help individuals better manage the condition.

Whether you experience occasional seizures or are managing a chronic seizure disorder, it’s crucial to seek medical guidance to ensure proper care and minimize complications.

If you or someone you know has experienced a seizure, don’t hesitate to consult with a healthcare provider for a proper diagnosis and treatment plan. By being aware and prepared, you can navigate the challenges of living with seizures and improve your overall quality of life.

References

• CDC – First Aid for Seizures
• The University of Alabama at Birmingham – 6 seizure symptoms and their warning signs
• University of Utah Health – Warning Signs of a Seizure
• Healthdirect Australia Limited – Seizures
• Mass General Brigham Incorporated – Warning Signs of a Seizure and How to Help
• CDC – Types of Seizures
• UC Davis Health – Seizure disorder symptoms and causes, and how those with epilepsy can get help
• Healthline – Can You Tell If You or Someone Else Is About to Have a Seizure?
• Epilepsy Foundation – Seizure Phases
• The Johns Hopkins University – Types of Seizures
• Penn Medicine – What is a seizure?
• Epilepsy – Focal seizures
• CURE Epilepsy – Phases of Seizures
• St John Ambulance – Seizure
• The American Red Cross – Seizures
• Cedars-Sinai – Differences Between a Stroke and a Seizure
• Epilepsy Society – Non-epileptic seizures