Many parents first notice a lisp when a child starts saying words with /s/ and /z/ more often—“sun,” “sister,” “pizza,” “zoo.” Sometimes it’s cute. Sometimes it makes speech harder to understand. And sometimes teachers or peers comment on it, which is when parents start Googling:
- “Is a lisp normal?”
- “When should a lisp go away?”
- “Do we need a speech therapist?”
- “Speech therapy near me”
A helpful starting point: not all lisps are the same, and not all require treatment at the same age. A licensed speech-language pathologist can determine whether a lisp is developmentally typical, an articulation disorder, or connected to a broader pattern such as tongue thrust or oral resting posture.
This guide covers the main types of lisps, why they happen, how SLPs evaluate them, and when articulation therapy is likely to help.
What is a lisp, exactly?
A lisp is a speech sound distortion that affects how air flows for sibilant sounds—most commonly /s/ and /z/ (and sometimes “sh,” “ch,” and “j”). The sound may come out “slushy,” “th-like,” or “mushy.”
Unlike some common developmental substitutions (like “wabbit” for “rabbit”), a lisp is often a distortion—meaning the child is trying for /s/ or /z/, but the sound quality is off.
Types of lisps in kids
1) Frontal lisp
This is the most common. The tongue pushes too far forward, and /s/ and /z/ can sound like “th.”
- “sun” → “thun”
- “zoo” → “thoo”
A mild frontal lisp can be developmentally common in very young children, but persistence is what matters.
2) Lateral lisp
Air escapes over the sides of the tongue, creating a “slushy” or wet sound. Lateral lisps are less likely to resolve on their own and often benefit from intervention once identified.
3) Dentalized lisp
The tongue presses against the teeth, causing a dampened /s/. It may not sound as “th-like” as a frontal lisp but can still reduce clarity.
4) Palatal lisp
The tongue contacts too far back toward the palate, changing the sound quality.
Practical takeaway: the type of lisp influences the treatment plan, which is why assessment matters.
What causes a lisp?
There isn’t always one single cause. Common contributing factors include:
Speech motor coordination and placement learning
Some kids simply need help learning the precise tongue placement and airflow for /s/ and /z/.
Oral habits and oral resting posture
Open-mouth posture, chronic mouth breathing, and the tongue resting forward can influence the “default” placement a child uses when speaking.
Tongue thrust patterns
Some children push the tongue forward during swallowing and at rest. When that pattern is present, it can be associated with speech distortions for some children—especially frontal lisps.
This is where orofacial myofunctional therapy (sometimes called myofunctional therapy or oro myofunctional therapy) may be relevant for oral function patterns in some cases. It isn’t automatic for every lisp, but it can be an important part of a whole-patient plan when oral function patterns are contributing.
Dental/orthodontic factors
Tooth spacing and bite patterns can influence airflow and placement. This doesn’t mean “braces fix a lisp,” but it can be part of the picture.
When is a lisp developmentally typical?
A mild frontal lisp can be seen in early speech development. What matters most is:
- Is your child’s overall speech becoming clearer over time?
- Are errors reducing naturally?
- Is your child easy to understand in daily life?
If the lisp is mild and your child is young, monitoring may be reasonable. If the lisp is persistent, affecting intelligibility, or impacting confidence, evaluation makes sense.
When to treat a lisp
Consider consulting a speech therapist or speech-language pathologist if:
- the lisp persists and is not improving over time
- your child is frequently misunderstood
- teachers or peers comment on it
- your child avoids words or speaking situations
- the lisp is lateral (often less likely to resolve without support)
- there are co-occurring concerns such as tongue thrust, mouth breathing, or oral resting posture patterns
If you’re already searching speech therapy near me, those are common “it’s time” reasons.
What does articulation therapy for a lisp look like?
Effective articulation therapy for a lisp usually includes:
1) Teaching the sound in a way the child can feel
- correct tongue placement
- airflow direction
- “how it should sound” and “how it should feel”
2) Building accuracy step-by-step
- sound → syllables → words → phrases → conversation
3) Carryover to real life
The goal isn’t a perfect /s/ in the therapy room. It’s a stable /s/ in everyday speech.
A good plan also includes brief home practice that fits your family’s routine.
What parents can do at home (helpful, not drill-heavy)
Model without over-correcting
Child: “thun.”
Adult: “sun.” (then continue)
Use short, playful practice if your child tolerates it
For example, a 60-second “snake sound” game can help some kids build awareness of a clear /s/ airflow.
Avoid making speech feel like a test
Repeated correction (“No, say it again”) often increases self-consciousness and reduces talking attempts.
If you want structured speech therapy practice activities, an SLP can tailor practice to the type of lisp and your child’s learning style.
If you’re searching “speech therapy near me”
Here’s what to ask when your concern is a lisp:
- Will the evaluation determine the type of lisp (frontal vs lateral, etc.)?
- What is the plan for home practice and carryover?
- If tongue thrust or oral posture patterns are present, how do you address that?
- Do you offer online speech therapy or virtual speech therapy if we need flexibility?
For many families, teletherapy speech therapy can work well for articulation goals when:
- the child can attend to short sessions
- a caregiver supports practice
- the plan includes clear cues and short, frequent practice
Where BreatheWorks fits
BreatheWorks is a speech-language pathology practice with a whole-patient approach that supports patients from infancy through geriatrics. Care may include speech/voice, feeding/swallowing, orofacial myofunctional therapy (OMT/OMD), and tmj dysfunction, with an emphasis on root-cause assessment across areas like sleep and breathing when relevant. You can start with in-person care at a clinic or choose secure virtual therapy with the same patient-centered model.
FAQ
Is a lisp in kids normal?
Some mild frontal lisps can be seen in early development. What matters is whether speech is improving and whether the lisp persists beyond the expected developmental window.
What age should a lisp be treated?
It depends on the type of lisp, impact on intelligibility, and whether it’s improving. Lateral lisps often benefit from earlier assessment.
Can tongue thrust cause a lisp?
Tongue thrust and forward tongue posture can be associated with frontal lisps for some children. An SLP evaluation can determine whether oral function patterns are contributing and whether myofunctional therapy is relevant.
Does online speech therapy work for lisps?
Often yes, especially for kids who can follow cues and practice briefly between sessions with caregiver support.
