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Can tonic conic seizures be caused by low blood sugar.? And how low does your blood sugar have to be to cause a seizure?

A MyEpilepsyTeam Member asked a question 💭
Yorktown, VA
December 16, 2025
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Tonic-Clonic (Grand Mal) Seizures Explained Read Article...
A MyEpilepsyTeam Member

@A MyEpilepsyTeam Member Normally whenever I have had a TC seizure and ended up in hospital checking blood sugar is always part of the standard tests they do. If its low, then it's always suspected to have at least contributed to why the seizure happened.

December 17, 2025
A MyEpilepsyTeam Member

I have type one diabetes and celiac disease with epilepsy. I have had seizures with low blood sugar levels and very high levels. I was in hospital with a hypoglycemic attack level of 12 on July 1st with a seizure in ambulance, there for 3 days! And if I get gluten by accident it has brought on a seizure or two.

December 17, 2025
MyEpilepsyTeam

Can low blood sugar cause tonic-clonic seizures, and what level triggers them?

Based on the available information about tonic-clonic seizures, the known causes include abnormal electrical activity in the brain related to:

* Brain injury or structural damage
* Infection
* Substance misuse, including alcohol
* Genetic factors Show Full Answer

Can low blood sugar cause tonic-clonic seizures, and what level triggers them?

Based on the available information about tonic-clonic seizures, the known causes include abnormal electrical activity in the brain related to:

* Brain injury or structural damage
* Infection
* Substance misuse, including alcohol
* Genetic factors (they tend to run in families)
* Abnormal brain development
* Imbalance of neurotransmitters

Low blood sugar isn't specifically mentioned as a cause of tonic-clonic seizures in the epilepsy literature. However, it's important to note that severe hypoglycemia can trigger seizure-like episodes in anyone, not just people with epilepsy.

If you're experiencing seizures and have concerns about blood sugar levels, it's crucial to discuss this with your doctor. They can evaluate whether metabolic factors might be contributing to your seizures and determine the appropriate testing and treatment plan for your specific situation.

December 16, 2025

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