Condition : Speech sound disorders
What are speech sound disorders?
Speech is a series of sounds which are used together to form words and sentences.
The development of speech sounds in children follows a normal developmental pattern, from simple sounds based on the letters “b”, “m” and “d”, progressing to more complex sounds like “ch” and, finally, to blends like “bl” and “sm”.
By the age of eight, your child should be able to produce all speech sounds. If they are struggling with making sounds, but have no issues with understanding speech, they may have a speech sound delay or disorder.
If your child has a speech sound delay or disorder, they may:
- avoid conversation
- drop, add, distort, or swap certain sounds (for example, they say “seep” instead of “sheep”)
- sound immature or use unusual vocabulary because they are choosing words with simpler sounds to replace more difficult ones
- replace difficult words with simplified versions (for example, “baba” instead of “bottle”)
- have difficulty making sounds in the right order
The following areas often worry parents, carers and teachers, but they’re all perfectly normal and don’t need treatment:
- lisping (when a “th” sound replaces the letter “s”) in children under seven – this usually disappears as children get older, and it can be temporary, due to lost teeth or braces
- rhotacism (saying “w” instead of “r”) in children under seven
- t-glottalization (leaving out the “t” in the middle and at the end of words) – this is often caused by an accent, but it is worth noting if your child is showing other speech problems
- th-fronting (saying “thing” as “fing”, “the” as “ve”, or “brother” as “bruvver”) – this is usually caused by accent, rather than speech difficulties
What causes speech sound disorders?
There are a number of reasons why children might struggle with speech, including:
- hearing problems
- poor phonological awareness (recognition and organisation of sounds)
- physical problems that affect the tongue, palate (roof of the mouth), or lips
- disorders affecting the nerves or areas of the brain involved in speech or coordination of the lips, tongue, and jaw
Sometimes, there may be no clear reason for a speech sound delay or disorder.
Bilingualism (speaking more than one language) or having an accent does not cause speech sound disorders.
Next steps
Browse our advice and resources to learn more about your condition and ways to manage it.
If you need further support or have concerns, a Healthcare Professional is here to help. Reach out for professional medical advice tailored to you.
Discover services and support options available to help you with your health and wellbeing.
Managing your health
We've created health advice and resources to help you confidently manage health conditions at home. Browse our expert guidance on self-care - tailored to your specific needs - and practical support to start seeing the benefits to your wellbeing and independence.
Related services
Speech and Language Therapy Service for children and young people
- Children & young people
Help for children and young people up to the age of 19 whose communication and/or swallowing difficulties impact on everyday life.
Speech and Language Therapy Service for children and young people: Go to serviceAudiology Service for children and young people
- Children & young people
Hearing and balance assessments from ages 0-18, plus hearing aid testing and fitting, rehabilitation, and other treatments.
Audiology Service for children and young people: Go to serviceMental health service for children and young people (CAMHS)
Mental health service for children and young people (CAMHS): Go to serviceExternal support
Further information on the NHS UK website
Speech and Language UK – Child’s progress checker
A tool to give you an idea of how your child’s speech is developing and whether you need support or advice.

