Tonic-Clonic Epilepsy: Causes, Symptoms & Treatment
18 July, 2025
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When hearing the word seizures, the first thing that comes to mind is fear. The fear of being helpless. If you are someone who is suffering from seizures or has a loved one suffering from this condition, you know how difficult it can be. The feeling of seeing someone on the floor, out of control, is terrifying. Tonic-clonic epilepsy is one of the most dangerous kinds of epilepsy. They strike without warning, disrupt lives, and, in some cases, threaten life itself. If you’re unfamiliar with this topic, this blog is here to help. We’ll comprehend what a tonic seizure is, the symptoms of tonic-clonic seizures, and available treatment options.
Understanding Tonic-Clonic Epilepsy
Tonic-clonic epilepsy, formerly called grand mal seizures, is a neurological condition that leads to recurrent, unprovoked tonic-clonic seizures. It is one of the most generalised forms of seizures, meaning that the abnormal electrical activity affects both sides of the brain from the outset.
But have you ever wondered why this epilepsy is called tonic-clonic? It is because this type has two phases:
- Tonic Phase: This marks the beginning of the tonic phase, where the body suddenly becomes rigid due to intense muscle contractions. If the person is standing, they may collapse as their muscles lock up. This phase typically lasts between 10 to 20 seconds.
- Clonic Phase: Following the body's stiffening during the tonic phase, this stage is characterised by repeated, strong jerking movements of the arms and legs. These movements happen because the muscles are quickly tightening and relaxing in cycles. The clonic phase usually continues for 30 seconds to a few minutes.
Symptoms of Tonic-Clonic Epilepsy
As mentioned above, this epilepsy has two phases, and each has its own set of symptoms. Listed below are some of the tonic-clonic seizure symptoms:
Tonic Phase (Stiffening)
This is the first part of the seizure, and here is how it feels:
- Loss of consciousness: You can suddenly lose awareness and fall to the ground.
- Muscle stiffening: All muscles in the body, especially in the arms, legs, and back, often become rigid, and your body may arch.
- Stopped or shallow breathing: Your breathing may become shallow or temporarily stop, potentially leading to a bluish tint to the skin.
- Clenched jaw: The jaw may clench tightly, sometimes leading to biting of the tongue or cheek.
Clonic Phase (Jerking)
This phase follows the tonic phase, and here’s what you can feel during this phase:
- Rhythmic jerking: The arms and legs begin to jerk violently. This happens because of the quick tightening and loosening of muscles.
- Foaming at the mouth: Saliva can mix with air and look foamy, sometimes with blood if the tongue or cheek was bitten.
- Loss of bladder or bowel control: Loss of bladder or bowel control is common at this stage because the muscles relax.
How is Tonic-Clonic Epilepsy Diagnosed?
Diagnosing this epilepsy begins with a deep medical history and physical examination. A neurologist will often ask detailed questions about the seizure episodes, including what happened before, during, and after the event, how long it lasted, and more.
The following are some of the most commonly used tools to accurately diagnose epilepsy. An accurate diagnosis is essential for choosing the most effective tonic-clonic seizure treatment plan.
- EEG (Electroencephalogram): Measures electrical activity in your brain to detect seizure patterns.
- MRI or CT scans: To identify brain abnormalities like tumours or lesions.
- Blood tests: Blood tests is done in order to rule out metabolic or infectious causes.
Tonic-Clonic Seizure Treatment
If you are someone suffering from tonic-clonic epilepsy, you must not be stressed. With the advancements in the medical industry, there is treatment available. Let’s take a look at them:
- Anti-Seizure Medications (ASMs): These drugs are one of the most vital parts of this kind of seizure treatment. With various options for ASMs, the doctor decides the one based on your seizure type, age, other medical conditions, and potential side effects.
- Lifestyle Modifications: Certain triggers can provoke seizures in some individuals. These might include lack of sleep, excessive stress, alcohol consumption, or flashing lights. Identifying and avoiding these triggers can be an important part of management.
- Dietary Therapy: For some forms of epilepsy, particularly in children, specific diets like the ketogenic diet, a high-fat, low-carbohydrate diet, can be effective. This diet alters the body's metabolism, which can have an anti-seizure effect.
- Vagus Nerve Stimulation (VNS): If medications don't fully control your seizures, VNS (Vagus Nerve Stimulation) may help. It involves placing a small device under the skin in the chest, connected by a wire to a nerve in the neck. This device delivers gentle electrical signals to the brain to help decrease how often seizures occur.
Wrapping Up
Managing tonic-clonic epilepsy can be difficult, but with accurate diagnosis and regular treatment, many people are able to live active, fulfilling lives with their seizures under control. Partnering with a neurologist to create a personalised treatment plan and staying educated about the condition are some of the basic steps in managing it effectively.
To manage such medical expenses without any stress, investing in health insurance can be a good option. At Niva Bupa, we have medical insurance plans with extensive coverage, such as prescription medications, hospital room rents, doctor consultations, treatment costs, and more. Our plans are offered at affordable premiums, reducing your financial burden.
Disclaimer: The details provided above are intended for informational purposes only. For accurate medical guidance, please consult your healthcare provider. Health insurance benefits are governed by the terms and conditions of your policy. For further details, review your policy documents.
People Also Ask
Is a single tonic-clonic seizure considered epilepsy?
No, a single tonic-clonic seizure does not automatically mean a person has epilepsy. Epilepsy is diagnosed when a person has two or more unprovoked seizures, or one unprovoked seizure with a high risk of recurrence.
What should I do if I witness someone having a tonic-clonic seizure?
Stay calm. Gently ease the person to the floor and place something soft under their head. Turn them onto their side to prevent choking. Loosen any tight clothing around their neck. Do not restrain them or put anything in their mouth.
Are tonic-clonic seizures dangerous?
Yes, especially if they last too long or happen frequently. They can lead to injury, breathing issues, or even sudden death if untreated.
How is a tonic-clonic seizure diagnosed?
Doctors use EEGs, MRIs, and detailed medical histories to confirm tonic-clonic epilepsy and rule out other conditions.
Can diet affect tonic-clonic epilepsy?
In some cases, diets like the ketogenic diet have been shown to reduce seizures, but always consult a doctor before making dietary changes.
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