Sturge-Weber syndrome

Sturge-Weber syndrome is a rare condition. The two main features are epilepsy and a birthmark (sometimes called a ‘port wine stain’) on the side of the face. Difficulties with vision and development problems are also common.

A young girl with Sturge-Weber syndrome smiling

Who gets Sturge-Weber syndrome?

Sturge-Weber syndrome is rare. It’s thought to affect between 2 and 5 in 100,000 children.

The condition is something you’re born with and is caused by a change (called a ‘mutation’) in a gene, called GNAQ. This mutation develops in a growing baby before they’re born – it’s not something that’s passed from parents.

Everyone who gets Sturge-Weber syndrome is affected differently. There are lots of symptoms and they all vary from person to person. Sturge Weber UK is a charity that supports people affected by this syndrome and has lots of information and stories about personal experiences.

Symptoms of Sturge-Weber syndrome

Sturge-Weber syndrome has a number of different symptoms. More than three quarters of children have seizures, around half will develop glaucoma, and more than half will have learning difficulties and developmental delays.

Not every child will be affected by all of the symptoms; it often depends on how severe the brain damage is as to the level of problems they may face.

  • Birthmark

    If your baby has Sturge-Weber syndrome, the first sign is usually the birthmark or ‘port wine stain’, which is normally noticeable straight after birth. The medical word for this is ‘angioma’. The birthmark:

    • Is flat and appears as deep red or purple on white skin, or very dark patches on brown or black skin
    • Occasionally it can be very pale, or not even visible at first, but it tends to become darker with age
    • Usually covers the forehead and upper eyelid, but may extend down the cheek
    • Usually just affects one side of the face, but rarely might affect both sides
    • Rarely may involve other parts of the body, like the neck and arms
    • Won’t grow any bigger as your child gets older
  • Seizures

    At least three-quarters of children with Sturge-Weber syndrome will have seizures. These are caused by the growth of blood vessels on the surface of the brain. Seizures usually start before your baby is 1. They may include:

    • Focal motor seizures – these cause repeated muscle jerks, called clonic seizures, in one area of your child’s body. They may spread to affect their whole body
    • Atonic seizures – where your child becomes floppy and suddenly falls down
    • Myoclonic seizures – these cause sudden jerking movements, usually on one side of the body
    • Infantile epileptic spasms – where your baby’s body briefly stiffens on one side or both sides of their body

    Seizures can happen often, and many times a day. They may also be prolonged, meaning that they last a long time. This may result in an emergency situation, called convulsive status epilepticus. Your child will need emergency treatment if they develop status. Your child’s specialist will discuss a care plan for you and your family to help you to prepare and manage situations like this.

    Children with Sturge-Weber syndrome often develop a weakness in one side of their body after a seizure. This is known as hemiparesis or hemiplegia. This may be temporary at first, but can become worse and last for longer with repeated seizures.

    Some children also have episodes of weakness without having seizures, which are similar to strokes in adults. Sometimes this weakness may be permanent. Your child may also develop migraine-like headaches as they get older.

  • Vision

    Children with Sturge-Weber syndrome also often develop problems with sight or vision. They may lose vision on part or all of one side of their visual field. This will usually be the same side of their body as they get weaknesses. This is called ‘hemianopia’.

    Around half of children develop a condition called glaucoma. This is raised pressure in the eye. It can cause loss of sight if it’s not treated. Children who have a birthmark involving their eyelid are more likely to be affected. Glaucoma can be present from birth, or it may develop later on during childhood.

  • Development and learning problems

    Developmental delay, learning and behaviour problems affect more than half of children with Sturge-Weber syndrome. These problems can be mild or severe and may happen more often in children who have more frequent or severe seizures.

Diagnosing Sturge-Weber syndrome

If your baby is born with a ‘port-wine’ birthmark on the upper part of their face, they should be assessed for Sturge-Weber syndrome. They should see a specialist doctor called a paediatrician.

Your child will need to have a brain scan to diagnose Sturge-Weber syndrome. This will usually be an MRI (magnetic resonance imaging). The scan is usually done with a dye or ‘contrast’. This can show up parts of the brain affected by Sturge-Weber syndrome. Sometimes other types of scan may be used, such as a CT scan.

They will also have an EEG (electroencephalogram) to look at the electrical activity in their brain, and how this relates to their seizures.

Your child should also be referred to an eye specialist (ophthalmologist) to test for glaucoma. The paediatrician can also refer them to an expert in children’s epilepsy called a paediatric neurologist.

Young girl with Sturge-Weber syndrome smiling

Nyla's Story

“We were settling into family life and finally able to enjoy our little princess. She was doing all the ‘baby things’ and things were looking up.

With Sturge-Weber and the seizures that come with this, they can be controlled for a period of time then all of a sudden creep up on you from nowhere.”

To read more about Nyla’s journey with Sturge-Weber syndrome, and to learn more about the condition, you can visit Sturge Weber UK.

Nyla's Story

Treatment for Sturge-Weber syndrome

Treatment for Sturge-Weber syndrome is mainly aimed at trying to control the seizures. Reducing the number or severity of the seizures can help to prevent the other problems associated with the condition.

Epilepsy medicines

Your child’s doctor may suggest several different epilepsy medicines to control their seizures.

These may include:

  • Carbamazepine
  • Levetiracetam
  • Lamotrigine
  • Sodium valproate
  • Topiramate

Sodium valproate can harm an unborn baby if taken during pregnancy. For this reason, if your child is able to get pregnant, or may do when they’re older, your child’s paediatrician will usually suggest an alternative medicine. If they do recommend treatment with sodium valproate, they will discuss the risks and benefits with you and your child first.

Your child’s specialist will discuss a ‘rescue’ or emergency care plan with you to treat any prolonged or repeated seizures.

Information about treatments for children can be found on the Medicines for Children website.


Many children with Sturge-Weber syndrome find their epilepsy becomes resistant to medical treatment. If this happens, your child’s specialist may suggest considering epilepsy brain surgery. Surgery involves removing or disconnecting the part of the brain that causes the seizures. To be considered for surgery, your child will need to be referred to a specialist centre. This will be done through the ‘Children’s Epilepsy Surgery Service’ (CESS).

Treatment for other problems

Your children may see a range of different doctors and other health professionals to treat other problems related to their condition.

If they are experiencing stroke-like episodes, they may be offered daily low-dose aspirin. There are certain risks of taking aspirin in children, and your child’s paediatrician or paediatric neurologist will discuss this with you.

If glaucoma develops, it can be treated with daily eye drops and if necessary, an operation.

The birthmark can be managed by make-up or laser treatment.

Your child will need regular follow-up with a specialist eye doctor (ophthalmologist) and a skin specialist (dermatologist).

Outlook of Sturge-Weber syndrome

There is a varied outlook for children with Sturge-Weber syndrome. If your child’s seizures are well controlled, or less severe, there is often a much more positive outlook.

If both sides of your child’s brain are affected, this often means the seizures are worse, and any learning disabilities or visual problems are more severe. Unfortunately, if both sides of the brain are damaged, surgery is much less likely to help.

Sadly, Sturge-Weber syndrome tends to slowly get worse with age. To what level often depends on how well the seizures are controlled.

Problems such as seizures and stroke-like episodes can continue throughout life. If your child has learning disabilities this might affect their education, and may present challenges in the workplace or living independently. There is a lot of support available to help those with learning difficulties, as well as Sturge-Weber syndrome. We have listed some of these organisations at the bottom of this page.

Other names for Sturge-Weber syndrome

Sturge-Weber syndrome may also be called:

  • Encephalofacial angiomatosis
  • Encephalotrigeminal angiomatosis

The term ‘encephalo’ means it’s to do with the brain, while ‘facial’ or ‘trigeminal’ refers to the area where you get the birthmark. ‘Angiomatosis’ is the name for a growth of blood vessels. It’s this abnormal growth of blood vessels that causes the symptoms associated with Sturge-Weber syndrome.

Sturge-Weber syndrome is one of a group of conditions called ‘neurocutaneous syndromes’. This is because it affects the brain (‘neuro’) and also the skin (‘cutaneous’).


Contact – for families with disabled children

Freephone helpline: 0808 808 3555

Hemihelp at Contact

Support and information for people with hemiplegia and their families in the UK.


Freephone helpline: 0808 808 1111

Sturge Weber UK
Support group for families and adults affected by Sturge Weber syndrome.

Birthmark Support Group

Providing UK-based support for anyone with a birthmark and their families.
Phone: 07825 855 888

This information has been produced under the terms of the PIF TICK. The PIF TICK is the UK-wide Quality Mark for Health Information. Please contact if you would like a reference list for this information.
Published: August 2023
Last modified: May 2024
To be reviewed: August 2026
Tracking: A043.05 (previously S012)
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