5 Signs You Could've Had a Seizure During Sleep

86% of nocturnal seizures go unnoticed. But their effects can still impact health, safety and quality of life of the whole household.

If you or someone you care for lives with epilepsy, recognizing the subtle signs of a seizure that occurred during sleep can help you seek timely medical advice, prevent future risks and better manage epilepsy.

Find out bellow what are the 5 important indicators to watch for the morning after.

1. Tongue or Cheek Biting

Waking up with small cuts, swelling or blood on your pillow could be a sign of tongue or cheek biting during a seizure.
This happens when jaw muscles tighten suddenly and involuntarily, often during tonic-clonic (former grand mal) seizures, causing the teeth to clamp down.

 What to do:

1. Gently check the inside of the mouth for wounds;
2. Rinse with salt water to prevent infection;
3. Monitor if this happens repeatedly and inform your neurologist about it.

2. Loss of Bladder Control

Some seizures, especially tonic-clonic types, can cause urinary incontinence while sleeping.
Although it can feel uncomfortable to discuss, it’s an important symptom to track as it can help your healthcare provider adjust treatment and improving symptoms.

What to do:

1. Note when it occurs and any other symptoms before bed;
2. Protect bedding with waterproof covers for hygiene;
3. Discuss it with your care team as repeated incidents may signal breakthrough seizures.

3. Extreme Morning Tiredness or Confusion

Feeling unusually groggy, disoriented, or exhausted upon waking, despite getting a full night’s sleep, could indicate a seizure occurred overnight.
This post-seizure state, called the postictal phase, can last from minutes to several hours.

What to do:

1. Keep a seizure diary to track these episodes;
2. If confusion lasts more than a few hours, seek medical advice;
3. Ensure a safe home environment in case disorientation happens after waking.

4. Unexplained Muscle Soreness

Waking up with neck, arm, or leg pain, despite no strenuous activity the previous day, could point to muscle contractions during a seizure. These contractions can be intense, similar to running a marathon in seconds.

What to do:

1. Stretch gently to relieve stiffness;
2. Track when and where soreness appears;
3. Mention it at medical appointments to aid diagnosis.

5. Messy or Displaced Bedding

If bed linens are tangled, displaced or you find yourself or someone you care for in an unusual sleeping position, it may indicate significant movement during the night.
This could include thrashing, jerking, or rolling, all possible seizure-related activity.

What to do:

1. Note any unusual bedding changes each morning;
2. Consider nighttime monitoring options, especially those with live video-feeds for added safety;
3. Remove sharp or hard objects near the bed to prevent injury.

Why It’s Important to Spot These Signs

Nocturnal seizures can be dangerous as they often go unwitnessed, as they carry risks such as injury, poor sleep quality and in rare cases, SUDEP (Sudden Unexpected Death in Epilepsy).

Click here to read our article about What is SUDEP. 

By learning to recognise the signs, you can provide better health information to your doctor and potentially adjust treatment to improve seizure control and improve life quality.

When to Seek Urgent Help

Call emergency services immediately if:

• The seizure lasts more than 5 minutes;
• Another seizure follows without recovery in between;
• The person is injured, has trouble breathing or is pregnant.

Spotting the signs of an overnight seizure isn’t always easy, but even small clues matter.
Track them, share them with your healthcare provider and consider safe nighttime monitoring devices such as Lampsy to reduce risks and restore your peace of mind.

Disclaimer: This information is for educational purposes only and should not replace professional medical advice. Always consult with your healthcare provider before making changes to your epilepsy management plan.