How to Get Rid of a Lisp: Practical, Evidence-Based Strategies that Work

A lisp is one of the most common speech differences—and one of the most misunderstood. If you’re wondering how to get rid of a lisp, you’re not alone. Whether you’re helping a child or working on your own speech, there are clear, evidence-based strategies that make a real difference. This guide explains what a lisp is, why it happens, and how to practise the right skills to speak more clearly, with examples you can use at home.

Understanding a Lisp: What It Is, What It Isn’t

A lisp typically affects the “s” and “z” sounds and sometimes other sibilants like “sh,” “ch,” and “j.” Instead of a clean, forward airflow that produces a crisp hiss, the tongue or airflow is slightly off, causing the sound to be distorted.

Most lisps are motor-based issues (how the tongue moves and where it rests). They’re not a sign of intelligence, effort, or motivation. Importantly, many children develop clear “s” and “z” sounds by school age, but if a lisp persists, targeted help is often needed. For age expectations across sounds, see our guide to speech sound development by age.

Types of Lisp: Interdental, Dentalized, Lateral

Not all lisps are the same. Knowing which type you’re dealing with helps you choose the right strategy.

• Interdental lisp: The tongue comes between the teeth and “s” sounds like “th.”
• Dentalized lisp: The tongue pushes against the front teeth; the sound is muffled or slushy.
• Lateral lisp: Air escapes over the sides of the tongue, creating a wet or “slushy” sound. Lateral lisps usually need professional guidance.

Each type responds to slightly different placement cues. Interdental and dentalized lisps often improve with clear instruction and practise. Lateral lisps tend to be more stubborn and benefit from one-on-one speech therapy.

When to Seek Help in Canada

If a child still has a noticeable lisp past early elementary years, or if the lisp bothers them socially or academically, it’s a good time to consult a Speech-Language Pathologist (SLP). Teens and adults can successfully change a long-standing lisp with structured practise and support.

Learn what SLPs do and how they help across the lifespan in What a Communication Therapist Does—and How They Help Canadians of All Ages. For broad, practical options, see Speech therapy in Canada: practical, evidence-based support for better communication.

How an Accurate “S” Is Made: Placement, Airflow, and Voicing

Getting the “s” right depends on precise tongue placement and airflow. Here’s the blueprint:

• Tongue tip placement: Lightly touch the tongue tip behind the top front teeth at the bumpy ridge (the alveolar ridge). Do not press against the teeth.
• Tongue shape: Form a narrow groove down the centre of the tongue for the air to pass through.
• Teeth and lips: Teeth are gently together or very close; lips are slightly apart and relaxed.
• Airflow: Continuous, steady air through the centre—no puffing or breaks.
• Voicing: “S” is voiceless (no vocal cord vibration). “Z” uses the same placement but is voiced (add vibration).

A common trick is to start with a whispered “s” to avoid accidentally voicing the sound like “z.” If you hear “th,” the tongue is likely too far forward. If you hear a slushy side sound, air might be escaping over the sides rather than the centre.

A Step-by-Step Plan to Fix a Lisp

Speech therapy often follows a predictable progression, moving from easier to harder contexts. You can use this framework at home to support therapy or, for mild cases, to get started.

Step 1: Start with the Sound in Isolation

• Find the placement: Use a mirror to locate the alveolar ridge and place the tongue tip behind the top front teeth.
• Shape the tongue: Think “narrow tunnel” down the centre of the tongue.
• Airflow drills: Practise a long, steady “ssssss.” If it becomes “th,” move the tongue back slightly. If it’s slushy, tighten the centre groove and keep air from leaking over the sides.

Keep these attempts short—5 to 10 good “s” sounds at a time. Quality over quantity.

Step 2: Move to Syllables and Words

• Begin with easy syllables: “sa,” “see,” “sue,” “so,” “si.” Then practise “as,” “uss,” “is” to put “s” at the end.
• Use minimal pairs: Practise “sip–ship,” “sell–shell,” “see–zee” to focus on distinctions.
• Word lists: Build short lists (5–10 words) for “s” at the start (sun, soup, sit), middle (basket, pencil), and end (bus, ice, dress).

Keep a small notebook. Note which positions are easiest. Many people start with “s” at the start of words and add other positions as accuracy grows.

Step 3: Build Sentences and Conversation

• Short phrases: “Six sunny seas,” “Sam sips soup,” “Ice is nice.”
• Controlled sentences: Read a sentence slowly, then at a natural pace.
• Conversation prompts: Talk about your day, a favourite sport, or a recipe, listening for your “s.”

Record brief clips on your phone. Reviewing a day later can make errors stand out more clearly and help you track progress.

Step 4: Carryover in Real Life

• Pick two routines: For example, “use my best ‘s’ during morning greetings” and “during supper conversations.”
• Set reminders: Sticky notes or a phone alert act as gentle cues.
• Gradual increase: Add new situations each week: school presentations, client calls, or sports practice.

Carryover is where many people stall. Keep stakes low, choose predictable moments, and celebrate small wins.

Practice Ideas at Home

Short, frequent practise sessions beat long, occasional ones. Aim for 5–10 minutes, 5 days a week.

Playful Games for Kids

• Sticker lines: Place five stickers: each correct “s” moves a token forward. Reach the last sticker to “win.”
• Craft-and-say: Build a paper “snake” and name it with lots of “s” words.
• Sound detective: Read a page and circle words with “s,” then say them clearly.

For more family-friendly ideas, explore practical speech therapy tips Canadian families can use every day.

Strategies That Work for Teens and Adults

• Micro-practise: Two-minute drills before calls or meetings.
• Anchor phrases: Choose a sentence you say often and make it your “accuracy anchor.”
• Self-monitoring: Record short audio journals. Identify the first moment the “s” slips and what might have changed (speed, stress).

Myofunctional Factors: Tongue Thrust, Bite, and Breathing

Sometimes, a lisp is connected to how the tongue rests and how you breathe. Mouth breathing, low tongue posture, or a tongue thrust swallow can make correct “s” placement harder. Braces, dental spacing, or bite differences can also affect airflow and contact points.

If you suspect these factors, an SLP can coordinate care with dental or medical professionals. For trustworthy national health information, refer to Health Canada. Population-level data and trends about Canadians and health services are available through Statistics Canada.

Evidence-Based Therapy Approaches

SLPs draw on motor-based and phonological frameworks to correct a lisp. Approaches are tailored to the person’s specific error pattern and goals.

• Phonetic placement: Direct, concrete instructions to set tongue tip, groove, teeth, and airflow correctly.
• Shaping: Turning an accurate “t” or “n” placement into “s” by extending the airflow and adjusting voicing.
• Feedback: Mirrors, tactile cues (like a straw to feel central airflow), and recordings to reinforce accuracy.
• Minimal pairs: Useful when the listener hears a substitution (e.g., “th” for “s”), training the contrast.
• Generalization techniques: Structured practice that gradually moves into spontaneous speech.

Virtual and in-person therapy are both effective when delivered by qualified clinicians. Read about the evidence behind telepractice in Virtual Speech Therapy: The Complete Evidence-Based Guide to Effectiveness and Benefits, and if you prefer to work from home, see online speech therapy in Canada.

Tracking Progress and Staying Motivated

Change takes time, but it’s measurable. Tracking accuracy helps you see the path forward and adjust practise.

• Set tiny goals: “5 accurate ‘s’ in a row” or “3 correct ‘s’ words at breakfast.”
• Use simple ratings: After a practise set, rate yourself 1–5 for accuracy and effort.
• Plan for bumps: Fatigue, stress, and speed can increase errors. Slow down and reset placement.

Most people improve fastest with brief, daily practise plus regular check-ins with an SLP who can refine cues and troubleshoot barriers.

Getting Support in Canada: In-Person and Online

If you’re ready for professional guidance, you have options. You can find services in your area with Speech therapy near me in Canada: how to find quality care that fits your life and learn how to pick a speech therapist who matches your goals and schedule.

If in-person sessions are hard to access, high-quality care is available virtually. Explore practical, evidence-based online speech therapy in Canada to see how structured, guided practise can fit your life.

Bottom Line: Steady Practise Brings Change

Most lisps respond to clear placement cues, consistent practise, and thoughtful support. The path is straightforward: master the sound in isolation, build accuracy through syllables and words, then take it into sentences and daily conversation. With a plan, patience, and the right guidance, you can make your speech clearer and more confident—at any age.