Speech Regression: When a Child Stops Using Words

If your child has stopped using words they used to say, book an appointment with your paediatrician this week rather than waiting to see if the words come back. The American Academy of Pediatrics says to tell your child's doctor if your baby stops talking or doing things they used to do. Losing skills is different from talking late, and it deserves a prompt look at any age.

There are several possible reasons. In toddlers between about 15 and 24 months, the most common one doctors consider is autism, but hearing problems, rare seizure conditions, other medical causes and major stress can also play a part. Many causes are treatable, and early support helps in every case, so the goal is a quick, calm evaluation, not panic.

What counts as speech regression?

Speech regression, sometimes called language regression, means a child loses words or language skills they had clearly been using. It is not the same as a child who is slow to start talking, or one whose words come in bursts with quiet weeks in between.

When you think back, separate words your child said once or twice from words they used regularly for weeks. Also notice whether other things changed at the same time: eye contact, smiling back, waving, pointing, response to their name, play, hand use or walking. Losing words along with social skills points the doctor in a different direction from losing words alone.

Possible causes when a toddler stops talking

Possible cause	Typical age	Other clues
Autism with regression	Usually 15 to 24 months	Fewer gestures, less eye contact and shared smiles, less response to name, more solitary play
Hearing loss, including fluid behind the eardrum	Any age	Recent colds or ear infections, turning up the TV, not reacting to sounds
Landau-Kleffner syndrome (rare)	Usually between 2 and 8 years	Loses understanding of speech as well as talking; seizures in many children
Rett syndrome (rare, almost always girls)	After 6 to 18 months of apparently typical development	Loss of purposeful hand use, repetitive hand wringing or clapping
Stress or anxiety	Any age, often older toddlers and preschoolers	A clear trigger such as a move, new sibling or school; may still talk in some places

Autism with regression

The AAP estimates that about 25% of children later diagnosed with autism lose some language they had been using, either suddenly or gradually, usually between 15 and 24 months. Some also become more withdrawn. A 2021 review in Autism Research that pooled 75 studies found that about 30% of autistic children had some regression, with an average age of onset of about 20 months. The CDC also notes that some autistic children stop gaining new skills or lose skills, usually around 18 to 24 months.

If this is what is happening, you have not caused it, and you have not missed it by "not noticing sooner". Regression often looks like an ordinary toddler phase while it is happening.

Hearing problems

The AAP notes that most children have mild, temporary hearing loss when fluid builds up in the middle ear after colds or ear infections. A child who cannot hear words clearly may stop trying to use them. Hearing can be tested at any age, and a newborn test that was passed does not rule out a problem now.

Landau-Kleffner syndrome and other seizure-related causes

Landau-Kleffner syndrome is a rare condition in which a child who was developing normally loses the ability to understand and use language, usually between ages 2 and 8. According to NORD, it often comes with seizures and is diagnosed with the help of an EEG, a test of the brain's electrical activity. Treatment is led by a neurologist, and NORD notes that starting speech therapy promptly is linked to better long-term outcomes. Our post on childhood epilepsy explains EEGs and seizures in more detail.

Rett syndrome

MedlinePlus describes Rett syndrome as a brain disorder that occurs almost only in girls. After 6 to 18 months of apparently normal development, girls with classic Rett develop severe difficulties with language and communication, lose purposeful use of their hands and often make repeated hand wringing or clapping movements. It is diagnosed by a specialist and confirmed with genetic testing. Read more in our guide to Rett syndrome early signs and support in India.

Stress and anxiety

Big changes can make young children quieter for a while: a new baby, moving cities, starting playschool, illness in the family, or conflict at home. A child who talks freely at home but goes silent at playschool or with relatives is a different picture, and may point to selective mutism. Our posts on selective mutism and autism and selective mutism explain the difference. Stress should never be assumed to be the cause until hearing and development have been checked.

What to record before the appointment

Doctors rarely see a child at their best or worst in a 15-minute visit. Your notes are often the most useful evidence they get.

A word list. Every word or phrase your child used to say, roughly when it started, and when you last heard it. Ask your partner, grandparents and the nanny to add to it.
Old videos. Scroll back through your phone and the family WhatsApp group. Clips of your child saying words, waving or playing six months ago are gold.
A short new video of how your child plays, communicates and moves now.
Other skills. Changes in eye contact, pointing, waving, response to name, play, hand use, walking, sleep, eating or toileting.
Health events. Fevers, ear infections, hospital stays, any seizures or episodes that looked like seizures, and any big changes at home.
Family history of speech delay, autism, epilepsy or hearing loss.

Who to see first, and what tests to expect

Your paediatrician, promptly. Say clearly: "My child has lost words they used to say." That sentence should get your child seen sooner. The CDC advises talking to your child's doctor and asking about developmental screening whenever a child has lost skills.
A hearing assessment by an audiologist, along with an ear check.
A developmental paediatrician or paediatric neurologist, who may suggest an EEG (sometimes during sleep), genetic tests or other investigations depending on what they find.
A developmental or autism assessment if social skills have also changed.
A speech and language therapist, who can start working with you while medical tests are under way.

Children under 6 can also be seen at government District Early Intervention Centres, which offer multidisciplinary assessment and therapy under the Rashtriya Bal Swasthya Karyakram.

Watch and wait, or act now

Usually fine to watch

A brand-new word appeared once or twice and has not come back, but your child keeps adding other words.
Your child is quieter for a few days during an illness, then picks up where they left off.

Act now: see your paediatrician this week

Your child has stopped using several words they used regularly.
Your child seems to understand less than before.
Loss of words comes with less eye contact, pointing, waving or response to name.
Your child has lost hand skills, walking skills or toilet skills.
There are seizures, staring episodes you cannot interrupt, or unusual movements in sleep.

If your child has a seizure or cannot breathe, the AAP advises calling for emergency help straight away. Call an ambulance or go to the nearest emergency department.

What therapy looks like after speech regression

Therapy depends on the cause, but some things are common. A speech therapist will assess what your child understands and how they communicate now, not only how many words they say. Sessions are usually play-based and teach you strategies to use during meals, baths and bedtime, because that is where most practice happens.

Many children benefit from extra ways to communicate while speech returns, such as gestures, pictures or a simple device. This does not stop speech from coming back. Our post on the myth that AAC delays speech explains why. For autistic children, early intervention often combines speech therapy, occupational therapy and parent coaching.

Carely's speech therapists see children at home across Bangalore, so therapy fits into your family's routine. While you wait for appointments, our free speech and language milestone checker helps you record where your child is now. You can also message us on WhatsApp to talk through next steps.

Frequently asked questions

Is it normal for a toddler to stop talking?

Losing words that were used regularly is not a typical phase and should be checked by a doctor promptly. A single new word that disappears, or a quiet few days during illness, is more common and less worrying.

Does speech regression always mean autism?

No. Autism is the most common cause doctors consider between 15 and 24 months, but hearing loss, rare seizure conditions such as Landau-Kleffner syndrome, Rett syndrome in girls and stress are other possibilities. A proper assessment is needed to tell them apart.

Will my child get their words back?

Many children regain words and build new ones with the right support, though progress varies with the cause. Starting therapy early and treating any medical cause gives your child the best chance.

At what age does autism regression happen?

The AAP says language loss in autism usually happens between 15 and 24 months. A 2021 review found an average age of onset of about 20 months.

What tests will the doctor do?

Usually a hearing test, a developmental assessment and a physical and neurological examination. Depending on the findings, an EEG, genetic tests or a referral to a specialist may follow.

Sources

By The Carely Team