A couple sitting at a kitchen table at home, talking together over cups of tea

Signs of Dysarthria After Stroke: What Families Notice

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After a stroke, the muscles used for speaking — the lips, tongue, jaw, voice box and breathing muscles — can become weak, slow or poorly coordinated. This difficulty is called dysarthria, and it means speech may sound slurred, slow, quiet or strained. The person usually knows exactly what they want to say; it is the clarity of the speech that has changed.

Families are often the first to notice the change, sometimes before anyone has put a name to it. You might hear yourself saying things like “his words sound thick”, or “she sounds tired when she talks”. These descriptions capture something real: the person and their words are unchanged, but the machinery that shapes the words is not working as smoothly as before.

This article explains the signs families notice most, why they happen, and what tends to help in everyday conversation. It cannot say what is causing one particular person’s speech changes — only an assessment can do that — but it can help you recognise the pattern and feel clearer about the next step.

A couple sitting at a kitchen table at home, talking together over cups of tea

Key Takeaways

  • Dysarthria is a difficulty with the muscles of speech, not with language, thinking or intelligence.
  • Common signs include slurred sounds, a slow or uneven pace, a quiet voice, and speech that sounds strained, breathy, nasal or flat.
  • The signs vary from person to person, depending on which part of the brain the stroke affected.
  • Speech is often clearer when the person is rested, and harder when they are tired, rushed or upset.
  • A speech and language therapist can assess the speech and work with the person and their family on strategies and therapy.
  • New or sudden slurred speech is an emergency — a possible stroke. Call the local emergency number immediately.

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Slurred or imprecise speech sounds

The sign families notice most is that the sounds of speech are no longer as crisp as they were. Words may run into one another, and the edges between them blur. Consonants — the sounds that give words their shape, like p, t, k, s and sh — may come out softened or only partly formed, so “toast” might sound more like “toas”.

This happens because the tongue and lips cannot move as quickly, as far or as precisely as they need to. Speaking is a fast, finely timed activity: the tongue has to touch exactly the right spot for each sound, many times a second. When those movements are weaker or slower, the sounds come out less distinct, and listeners have to work harder to follow.

Slurred speech is sometimes mistaken by strangers for tiredness or for the effects of alcohol. That misunderstanding can be upsetting, and it is never the person’s fault — it is simply what weakened speech muscles can sound like.

A slow or uneven rate

Many people with dysarthria speak more slowly than before. Each word takes more effort to form, so sentences come out at a slower, more deliberate pace, sometimes with pauses in unusual places while the mouth prepares the next sound.

The opposite pattern happens too: some people speak in short, rushed bursts, words tumbling out quickly and unevenly before a pause. Either way, the natural rhythm of conversation is disrupted, and both speaker and listener may need more time than they used to.

A quiet voice, and running out of breath

Speech is powered by breath. When the breathing muscles are weaker, or breath and voice are not well coordinated, the voice may become noticeably quieter. Family members often find themselves saying “pardon?” more often, or noticing that the person cannot be heard across a room or over background noise.

You may also notice that the person runs out of breath part-way through a sentence. Their speech may fade towards the end of a phrase, or they may need to stop and take an extra breath before finishing. Talking on the telephone can be especially hard work, because the listener cannot see their face or gestures for clues.

A woman sitting in a comfy chair at home, speaking on the telephone

A strained, harsh or breathy voice

The voice itself may sound different. For some people it takes on a strained, tight or harsh quality, as if the words have to be pushed out, and talking for long feels like hard physical work.

A breathy quality is also common: the voice sounds soft and airy, with breath escaping around the words, because the vocal cords are not closing as firmly as they should. Whatever the pattern, the change is in the voice’s machinery, not in anything the person is doing wrong — most people are trying just as hard to be clear as they ever did.

Less melody and expression in the voice

Speech normally rises and falls. We lift our voices at the end of a question, stress the important word in a sentence, and vary our tone to show feeling. When the muscles of speech are affected, this melody can flatten out, so speech sounds more monotone — on much the same level from start to finish.

Families sometimes describe this as the person “sounding flat” or “not sounding like themselves”. It is worth knowing that a flatter voice does not mean flatter feelings. The person may feel just as much warmth, humour or urgency as before; the voice is simply less able to show it. Listening to their words, and watching their face, often gives a truer picture.

A nasal quality to the speech

Speech may also take on a nasal quality, as if the person has a cold they cannot shake off. At the back of the mouth, a flap of muscle called the soft palate lifts to close off the nose during most speech sounds. If that movement is weak, too much air escapes through the nose.

For some people the opposite happens, and speech sounds as though the nose is blocked, because air cannot move through the nose for sounds like m, n and ng. Either change shows that one part of the speech mechanism is not moving as it should, and an assessment will look at it closely.

Facial and mouth signs families may notice

Because the same muscles are involved, families may notice changes in the face as well. One side of the face may rest a little lower than the other, so a smile looks uneven, and the lips may not seal or purse as firmly as before.

Some families also notice occasional dribbling, because the lips do not close as completely as they used to; swallowing can be affected by the same muscle weakness, so any difficulty with eating or drinking needs its own prompt assessment by a speech and language therapist.

Clearer when rested, harder when tired

One of the most consistent patterns families describe is that speech changes across the day. Many people with dysarthria are at their clearest in the morning, or after a rest, when they have most energy for speaking. As tiredness builds, the muscles work less precisely, and speech becomes harder to understand.

Busy situations — a family gathering, an appointment, a long telephone call — can be especially demanding, and the person may need to rest afterwards. This is not a lack of effort or interest. Speaking with weakened muscles is genuinely hard work, rather like walking a long way on a sprained ankle.

A man chatting with two friends in a sunny garden at home

Harder when upset or hurried

Strong feelings affect everyone’s speech, but the effect can be much bigger with dysarthria. When the person is upset, anxious, excited or trying to say something quickly — to catch someone before they leave the room, for example — the extra pressure often makes speech less clear, just when they most want to be understood.

Knowing this can help families slow the moment down. Sitting down together, removing the time pressure and giving the person room to take their time helps far more than hurrying them or asking for instant repeats.

Why the signs vary from person to person

No two people with dysarthria sound exactly alike. A stroke affects a particular part of the brain, and the pattern of difficulty depends on which areas — and therefore which muscles and movements — are involved. One person’s speech may be mainly slow and quiet; another’s fast and strained; a third may have only mild slurring that strangers barely notice but family hears clearly.

Dysarthria also ranges from very mild to severe. At the mild end, speech is understandable but a little imprecise, especially when the person is tired. At the severe end, it may be so hard to understand that the person needs other ways of communicating alongside it, such as writing, gesture or communication aids. An assessment identifies the individual’s pattern and guides the support that follows.

How dysarthria differs from aphasia and apraxia

All three of these difficulties can follow a stroke, and they are sometimes confused, so it helps to separate them:

  • Dysarthria is about the muscles. The person knows the words and the sentences; the mouth, voice and breathing cannot carry them out clearly.
  • Aphasia is about language itself — finding words, building sentences and understanding what others say. The muscles may work perfectly; it is the words that are hard to reach.
  • Apraxia of speech is about planning and programming the movements of speech. The muscles are not weak, but the brain’s instructions for sequencing the movements go astray, so speech comes out inconsistently and effortfully.

The three can occur together, which is one reason a full assessment matters. You can read more in our guide to dysarthria and apraxia of speech compared.

What a speech and language therapy assessment looks at

A speech and language therapist assessing dysarthria will usually listen carefully to the person’s speech in conversation and in set tasks, and look at how each part of the speech mechanism is working. An assessment may cover:

  • How the lips, tongue, jaw and soft palate move, both on their own and in speech.
  • How breathing supports the voice, and how the voice sounds.
  • How clear the speech is to an unfamiliar listener (often called intelligibility).
  • How speech changes with longer sentences or tiredness.
  • Whether language, understanding or swallowing are affected too, so the whole picture is understood.

The therapist will also ask what matters most to the person and their family — being understood by grandchildren, returning to a social group, managing at work — because those goals shape the therapy.

What helps in everyday conversation

Therapy is planned by the therapist around the individual, but some gentle, everyday things help most conversations:

  • Face each other, and reduce background noise. Turn off the television or radio, and sit where you can see each other’s faces. Lip movements and expressions carry a lot of meaning.
  • Allow plenty of time. Rushing makes speech harder. Unhurried conversation, with natural pauses, gives the muscles their best chance.
  • Ask for the key word. If a sentence gets lost, asking for the most important word again, said slowly, often unlocks the whole message.
  • Be honest about understanding. It is kinder to say “I got the first part but missed the end” than to nod along and pretend, which can leave both of you frustrated and important things missed.
  • Confirm as you go. Repeating back what you understood — “So you’re saying you’d like to go on Thursday?” — checks the message and shows the person they are being heard.
  • Let the person speak for themselves. It is tempting to step in and finish sentences or translate. Sometimes that help is welcome, but most people prefer to be asked first, and to keep their own voice in conversation.
A family sitting around a dinner table at home, listening patiently as one person speaks

When to seek help

If speech remains slurred, quiet or hard to understand after a stroke, raise it with the person’s doctor and ask about a referral to a speech and language therapist; in many places you can also contact a therapist directly. Support is not only for the first weeks after a stroke — it is reasonable to ask at any stage if communication is difficult or changing. You can also read more about stroke and communication at stroke.org, or via your own national health authority.

One situation is different, and it is an emergency. New or sudden slurred speech can be a sign of a stroke happening now. This is especially urgent if it comes with a drooping face or weakness in an arm — the signs summed up by the word FAST: Face drooping, Arm weakness, Speech difficulty, Time to call. If you notice these signs, call your local emergency number immediately. Do not wait to see if it passes.

Questions to ask a therapist

If you arrange an assessment or a first appointment, these questions can help you get the most from it:

  1. What is causing the changes in speech, and which parts of the speech mechanism are affected?
  2. How is the person best understood at the moment — what seems to help most?
  3. What therapy might help, and what would sessions focus on?
  4. Are there things we can practise or do at home between sessions?
  5. Would any communication aids be useful alongside speech, for the times when speech is hardest?

Frequently asked questions

What is dysarthria, in simple terms?

Dysarthria is a speech difficulty caused by weakness or poor coordination of the muscles used for speaking — the lips, tongue, jaw, voice and breathing muscles. The person knows what they want to say, but their speech comes out less clearly than before: slurred, slow, quiet, strained or flat-sounding.

Is dysarthria the same as aphasia?

No. They are different difficulties, although they can happen together after a stroke. Aphasia affects language — finding words, forming sentences and understanding speech. Dysarthria affects the physical production of speech: the words are there, but the muscles cannot shape them clearly. An assessment can tell which are present.

Why is the speech clearer in the morning and worse later in the day?

Speaking with weakened muscles takes great effort, and effort fades with tiredness. When the person is rested, the muscles work at their best and speech is clearer; when they are tired, rushed or have been talking a lot, precision drops. Planning important conversations for the person’s best times of day can help.

Should we ask the person to repeat themselves, or is it kinder to pretend we understood?

Honesty, kindly offered, is usually better. Pretending to understand can lead to confusion and leaves the person feeling unheard. It helps to say what you did catch and ask for the part you missed, or for the key word again.

Can dysarthria happen without a stroke?

Yes. Anything that injures or affects the parts of the brain and nerves controlling the speech muscles can cause dysarthria — for example, a head injury, or some longer-term neurological conditions. This article focuses on stroke, but the signs, and the value of assessment, are much the same in other situations.

Will speech get better after a stroke?

It varies a great deal from person to person, and no one can promise a particular outcome. Some people find their speech becomes clearer over time, especially with therapy and practice; others live with longer-term changes and find strategies and aids that make communication work well. A speech and language therapist can assess the speech honestly, work on what can be improved, and help the whole family communicate as well as possible.

A gentle next step

If someone you love is living with slurred or difficult speech after a stroke, you do not have to work it out alone. An assessment can explain what is happening and what might help, and small changes in everyday conversation can make a real difference. If you would like to talk about speech after stroke, you are very welcome to get in touch online. There is no obligation and no pressure: just a friendly first conversation, at your pace.

By Hamayal Adnan, Speech-Language Pathologist

This article is for general educational purposes only and is not medical advice. It does not replace an assessment by a qualified speech and language therapist or other healthcare professional. Every person is different. If you have concerns about speech, language, feeding or swallowing, please seek professional advice. In an emergency, call your local emergency number.

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