Does HIE Cause Seizures in Babies?
A parent-friendly guide to understanding what’s happening—and what comes next
When your baby is diagnosed with hypoxic-ischemic encephalopathy (HIE), one of the most frightening things you may hear is that seizures are possible—or already happening. This can feel overwhelming. Understanding why seizures occur and what they mean can help you feel more grounded during a very uncertain time.
What Is HIE?
HIE (hypoxic-ischemic encephalopathy) happens when a baby’s brain doesn’t get enough oxygen and blood flow before, during, or shortly after birth. This lack of oxygen can injure delicate brain cells.
Depending on how long and how severe the oxygen deprivation was, the effects can range from mild to severe.
Do Babies With HIE Have Seizures?
Yes—Seizures in newborns are very common in babies with HIE.
In fact, HIE is one of the leading causes of newborn seizures, especially in full-term infants.
Why do seizures happen?
When brain cells are injured from lack of oxygen:
- The normal electrical activity of the brain becomes disrupted
- Damaged cells may “misfire”
- This abnormal activity can trigger seizures
Think of it as a short circuit in the brain’s electrical system.
When Do Seizures Typically Start?
Seizures related to HIE usually occur:
- Within the first 24–72 hours after birth
- Often during the time when brain injury is evolving
This is why babies at risk for HIE are closely monitored in the NICU.
What Do Newborn Seizures Look Like?
Seizures in newborns are often subtle and can be easy to miss. They may not look like the full-body convulsions people expect.
Common signs include:
- Repetitive lip smacking or chewing motions
- Eye blinking or staring spells
- Jerking or twitching of the arms or legs
- Bicycling movements of the legs
- Sudden pauses in breathing (apnea)
- Unusual stiffness or limpness
Sometimes, neonatal seizures can only be detected with brain monitoring.
How Are Seizures Diagnosed?
Doctors often use a test called an EEG (electroencephalogram) to detect seizure activity.
- It measures the brain’s electrical signals
- It can identify seizures that are not visible externally
- Continuous EEG monitoring is common in babies with HIE
How Are HIE-Related Seizures Treated?
Treatment focuses on protecting the brain and controlling seizures quickly.
- Often started within 6 hours of birth
- Helps reduce further brain injury
- Can lower the risk and severity of seizures
- Anti-Seizure Medications
Common medications include:
- Phenobarbital
- Levetiracetam
These help stabilize the brain’s electrical activity.
Do Seizures Cause Long-Term Problems?
They can—but not always.
The long-term outlook depends on:
- Severity of the HIE
- How quickly treatment was started
- How well seizures are controlled
Possible outcomes may include:
- Normal development (especially in mild cases)
- Developmental delays
- Cerebral palsy
- Epilepsy later in life
Importantly, early treatment improves outcomes.
What Should Parents Watch for After Going Home?
Even after NICU discharge, it’s important to monitor your baby for possible seizure activity.
Call your doctor if you notice:
- Repetitive or unusual movements
- Staring spells you can’t interrupt
- Sudden stiffening or jerking
- Developmental concerns
Follow-up care often includes:
- Neurology visits
- Developmental evaluations
- Possible repeat EEGs or MRIs
A Reassuring Note for Parents
Seeing your baby have seizures is incredibly distressing. But you are not powerless in this situation.
Today’s NICUs are highly experienced in:
- Detecting even subtle seizures
- Treating them quickly
- Supporting brain recovery
Many babies with HIE—especially those treated early—go on to make meaningful progress.
When Should You Ask More Questions?
If your baby has HIE and seizures, it’s reasonable to ask your medical team:
- What caused the oxygen deprivation?
- How severe is the brain injury?
- Are seizures under control?
- What does the MRI show?
- What follow-up care is needed?
Understanding these answers can help you advocate for your child.
Do You Have A Case?
You should consider contacting the legal team at HIE Newborn as soon as possible if:
- Your baby has been diagnosed with seizures and a condition like hypoxic-ischemic encephalopathy (HIE), cerebral palsy, or another birth-related and has missed some developmental milestones
- You suspect that something went wrong during labor or delivery, or you have concerns about the medical care you or your baby received.
Final Thoughts
Yes, HIE can cause seizures in babies—and often does.
But early recognition and treatment can make a significant difference.
If you’re navigating this diagnosis, focus on:
- Getting clear information
- Staying engaged with your care team
- Following through on early intervention services
You don’t have to understand everything at once. Take it step by step.
