Rett syndrome: signs, diagnosis, support | Raising Children Network

Rett syndrome is a rare genetic disorder caused by a mutation (change) in a gene on the X chromosome. It mainly affects females.
Rett syndrome affects the nervous system, causing intellectual and physical disability. While it is a lifelong condition and currently has no cure, treatments and therapies can help manage symptoms, especially if started early.
Rett syndrome can cause symptoms ranging from mild to severe, which can begin at different ages in different children. Most children show the first signs of the condition between 6 and 18 months of age. Children are usually diagnosed around 3 years of age.
Some key features of Rett syndrome are:
Children with Rett syndrome may also have slow head growth, small hands and feet, and abnormal muscle tone (Opens in new tab). They can also experience breathing problems and teeth grinding.
People with Rett syndrome may also:
Rett syndrome usually results from a random genetic mutation — a new change that is not passed down from a parent.
If you are worried that your child is not reaching language and movement milestones at an appropriate age, you may decide to see a doctor. If you have taken your child to the doctor before, they can help compare your child's development with previous visits.
Children are diagnosed with Rett syndrome based on their symptoms. This can be difficult as not all children have the same symptoms.
Genetic testing can confirm the diagnosis.
Treatment can help manage the symptoms of Rett syndrome.
Therapies such as physiotherapy, occupational therapy and hydrotherapy can help improve movement. Devices and methods are available to help with communication.
Medicines may help with seizures, breathing difficulties or digestion problems.
In some cases, surgery might be recommended for problems with the feet or spine.
People with Rett syndrome may have problems with their teeth and mouth. This can make it hard to eat enough, and children may need help with:
Some people with Rett syndrome need a feeding tube to get enough nutrition.
Around 6 out of 10 children with Rett syndrome live into middle age.
People with Rett syndrome will need lifelong personal care with assistance and equipment. Each person's needs depend on their individual symptoms.
Your child may be eligible for early intervention support through the National Disability Insurance Scheme (NDIS), which can help you access supports.
Rett syndrome can lead to:
Currently, there is no known way to prevent Rett syndrome. However, the complications of Rett syndrome can be prevented by getting treatment and support early.
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Last reviewed: August 2025










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