Sturge-Weber Syndrome in Babies
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published NIH, AAP, Sturge-Weber Foundation guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect sturge-weber syndrome in babies, here is what the evidence says.
The short answer
Sturge-Weber syndrome (SWS) is a rare neurocutaneous disorder involving a port-wine stain (capillary malformation) on the face, a vascular malformation on the brain surface (leptomeningeal angioma), and/or glaucoma. It is caused by a somatic GNAQ gene mutation and affects approximately 1 in 20,000 to 50,000 births. Not every child with a facial port-wine stain has SWS — the risk is highest when the birthmark involves the forehead and upper eyelid. Early diagnosis with brain MRI and eye examination allows for proactive seizure management and glaucoma screening, which can significantly improve outcomes.
Key takeaways
- Sturge-Weber syndrome (SWS) is a rare neurocutaneous disorder involving a port-wine stain (capillary malformation) on the face, a vascular malformation on the brain surface (leptomeningeal angioma), and/or glaucoma. It is caused by a somatic GNAQ gene mutation and affects approximately 1 in 20,000 to 50,000 births. Not every child with a facial port-wine stain has SWS — the risk is highest when the birthmark involves the forehead and upper eyelid. Early diagnosis with brain MRI and eye examination allows for proactive seizure management and glaucoma screening, which can significantly improve outcomes.
- Usually normal when: Your baby has a small port-wine stain that does not involve the forehead or upper eyelid
- Call your doctor if: Your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to NIH, AAP, Sturge-Weber Foundation guidelines, sturge-Weber syndrome (SWS) is a rare neurocutaneous disorder involving a port-wine stain (capillary malformation) on the face, a vascular malformation on the brain surface (leptomeningeal angioma), and/or glaucoma. It is caused by a somatic GNAQ gene mutation and affects approximately 1 in 20,000 to 50,000 births. Not every child with a facial port-wine stain has SWS — the risk is highest when the birthmark involves the forehead and upper eyelid. Early diagnosis with brain MRI and eye examination allows for proactive seizure management and glaucoma screening, which can significantly improve outcomes. At 0-3 months, a port-wine stain involving the forehead (V1 distribution of the trigeminal nerve) is the key finding that raises suspicion for SWS. The birthmark is present at birth as a flat, pink-to-red patch. Not all facial port-wine stains indicate SWS — bilateral or extensive upper face involvement carries the highest risk. A contrast-enhanced brain MRI is typically performed to look for a leptomeningeal angioma. An eye examination screens for glaucoma, which is present in about 30-70% of children with SWS affecting the upper face. Early ophthalmology referral is important. It is generally considered normal when your baby has a small port-wine stain that does not involve the forehead or upper eyelid. However, you should contact your pediatrician promptly if your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral.
Normal vs. Concerning
When to Seek Immediate Care
- Your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral
- Your child with SWS develops sudden weakness on one side of the body, speech difficulty, or severe headache — possible stroke-like episode requiring emergency care
- Your baby with SWS develops a cloudy, enlarged, or bulging eye — possible acute glaucoma requiring urgent ophthalmologic treatment
By Age
What to expect by age
0-3 months
A port-wine stain involving the forehead (V1 distribution of the trigeminal nerve) is the key finding that raises suspicion for SWS. The birthmark is present at birth as a flat, pink-to-red patch. Not all facial port-wine stains indicate SWS — bilateral or extensive upper face involvement carries the highest risk. A contrast-enhanced brain MRI is typically performed to look for a leptomeningeal angioma. An eye examination screens for glaucoma, which is present in about 30-70% of children with SWS affecting the upper face. Early ophthalmology referral is important.
3-12 months
Seizures are the most common neurological manifestation of SWS and typically begin in the first year of life, often before 12 months. Seizures usually start on the side of the body opposite to the brain angioma (since the brain malformation is on the same side as the port-wine stain). Seizures may be focal (affecting one side) or generalized. Prophylactic anticonvulsant therapy may be considered in some cases. Aspirin therapy (low-dose) is used in some centers to improve blood flow in the affected brain area and may reduce stroke-like episodes.
1-3 years
Seizure control is a primary focus of management during this period. Poorly controlled seizures are associated with greater developmental impairment. Some children develop hemiparesis (weakness on one side of the body) that may be gradual or follow stroke-like episodes. Developmental monitoring is important, as cognitive and motor delays can occur, particularly if seizures are frequent or difficult to control. Laser treatment (pulsed dye laser) for the port-wine stain can begin in infancy or toddlerhood and is most effective when started early.
3+ years
Long-term outcomes in SWS vary widely. Some children have well-controlled seizures and normal development, while others have refractory epilepsy and intellectual disability. Headaches and stroke-like episodes may occur. Glaucoma requires lifelong monitoring and treatment to preserve vision. In severe, medically refractory cases, surgical options including hemispherectomy may be considered. Multidisciplinary care involving neurology, ophthalmology, dermatology, and developmental pediatrics provides the best outcomes.
What to Tell Your Pediatrician
- Describe when you first noticed sturge-weber syndrome in babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby has a port-wine stain involving the forehead and/or upper eyelid and has not yet been evaluated for SWS.
- Mention if your child with SWS is having breakthrough seizures despite medication.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your baby has a small port-wine stain that does not involve the forehead or upper eyelid
- Your baby has a facial port-wine stain with a normal brain MRI and normal eye examination
- Your baby has a salmon patch (stork bite or angel kiss) — these common birthmarks fade and are not related to SWS
- Your child with SWS has well-controlled seizures, normal eye pressures, and is meeting developmental milestones
- Your baby has a port-wine stain involving the forehead and/or upper eyelid and has not yet been evaluated for SWS
- Your child with SWS is having breakthrough seizures despite medication
- You notice your child squinting, tearing excessively, or one eye appears larger than the other — possible glaucoma signs
- Your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral
- Your child with SWS develops sudden weakness on one side of the body, speech difficulty, or severe headache — possible stroke-like episode requiring emergency care
- Your baby with SWS develops a cloudy, enlarged, or bulging eye — possible acute glaucoma requiring urgent ophthalmologic treatment
What You Can Do at Home
- Keep track of when you notice sturge-weber syndrome in babies — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your baby has a small port-wine stain that does not involve the forehead or upper eyelid — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
- While monitoring at home, seek immediate care if your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral.
Related Conditions
My Baby Has a Port-Wine Stain
A port-wine stain is a flat, pink, red, or purple birthmark caused by abnormal blood vessels in the skin. It is present at birth, permanent, and does not fade over time like some other birthmarks. While most are purely cosmetic, those on the face may require medical evaluation and early laser treatment for best results.
Early Signs of Epilepsy in Babies
Seizures in babies can look very different from seizures in older children or adults. Subtle signs may include repeated eye blinking or deviation, lip smacking, cycling leg movements, brief stiffening episodes, or clusters of head drops (infantile spasms). Infantile spasms are a neurological emergency that requires urgent evaluation. Not all unusual movements are seizures - babies commonly have benign tremors and startle reflexes - but any movement pattern that seems involuntary, repetitive, and cannot be interrupted deserves medical evaluation.
My Baby Had a Febrile Seizure
Febrile seizures are frightening to witness but are usually harmless. They affect about 1 in 25 children, typically between 6 months and 5 years, and almost never cause lasting harm. Most children who have one febrile seizure never have another, and they don't increase the risk of epilepsy significantly.
Types of Seizures in Babies and What They Look Like
Seizures in babies can look very different from seizures in adults. Types include subtle seizures (eye deviation, lip smacking, bicycling movements), tonic seizures (stiffening), clonic seizures (rhythmic jerking), myoclonic seizures (quick jerks), and infantile spasms (clusters of brief body flexion). Any suspected seizure in a baby needs medical evaluation. Video-recording the episode on your phone is extremely helpful for your doctor to determine if it was truly a seizure.
Related Resources
Frequently asked questions
Is sturge-weber syndrome in babies normal?
When should I call the doctor about sturge-weber syndrome in babies?
When is sturge-weber syndrome in babies normal?
What causes sturge-weber syndrome in babies?
What should I mention to my pediatrician about sturge-weber syndrome in babies?
Is sturge-weber syndrome in babies normal at 0-3 months?
Is sturge-weber syndrome in babies normal at 3-12 months?
Should I go to the ER for sturge-weber syndrome in babies?
Does sturge-weber syndrome in babies go away on its own?
References
- [1]National Institute of Neurological Disorders and Stroke. Sturge-Weber Syndrome. NINDS, 2023. NIH
- [2]Comi AM. Sturge-Weber Syndrome. Handbook of Clinical Neurology. 2015;132:157-168. AAP
- [3]The Sturge-Weber Foundation. About SWS. SWF, 2024. Sturge-Weber Foundation
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Sturge-Weber Syndrome in Babies.
Things to mention
- Describe when you first noticed sturge-weber syndrome in babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby has a port-wine stain involving the forehead and/or upper eyelid and has not yet been evaluated for SWS.
- Mention if your child with SWS is having breakthrough seizures despite medication.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your baby has a port-wine stain involving the forehead and/or upper eyelid and has not yet been evaluated for SWS
- Your child with SWS is having breakthrough seizures despite medication
- You notice your child squinting, tearing excessively, or one eye appears larger than the other — possible glaucoma signs
Urgent signs to report immediately
- Your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain MRI and neurology referral
- Your child with SWS develops sudden weakness on one side of the body, speech difficulty, or severe headache — possible stroke-like episode requiring emergency care
- Your baby with SWS develops a cloudy, enlarged, or bulging eye — possible acute glaucoma requiring urgent ophthalmologic treatment
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
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Related Resources
Bottom line
Most cases of sturge-weber syndrome in babies are normal. Talk to your pediatrician if your baby with a facial port-wine stain has a seizure — seek emergency evaluation and discuss urgent brain mri and neurology referral.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Medical Concerns
My Baby Has a Port-Wine Stain
A port-wine stain is a flat, pink, red, or purple birthmark caused by abnormal blood vessels in the skin. It is present at birth, permanent, and does not fade over time like some other birthmarks. While most are purely cosmetic, those on the face may require medical evaluation and early laser treatment for best results.
Early Signs of Epilepsy in Babies
Seizures in babies can look very different from seizures in older children or adults. Subtle signs may include repeated eye blinking or deviation, lip smacking, cycling leg movements, brief stiffening episodes, or clusters of head drops (infantile spasms). Infantile spasms are a neurological emergency that requires urgent evaluation. Not all unusual movements are seizures - babies commonly have benign tremors and startle reflexes - but any movement pattern that seems involuntary, repetitive, and cannot be interrupted deserves medical evaluation.
My Baby Had a Febrile Seizure
Febrile seizures are frightening to witness but are usually harmless. They affect about 1 in 25 children, typically between 6 months and 5 years, and almost never cause lasting harm. Most children who have one febrile seizure never have another, and they don't increase the risk of epilepsy significantly.
Types of Seizures in Babies and What They Look Like
Seizures in babies can look very different from seizures in adults. Types include subtle seizures (eye deviation, lip smacking, bicycling movements), tonic seizures (stiffening), clonic seizures (rhythmic jerking), myoclonic seizures (quick jerks), and infantile spasms (clusters of brief body flexion). Any suspected seizure in a baby needs medical evaluation. Video-recording the episode on your phone is extremely helpful for your doctor to determine if it was truly a seizure.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.