If you have persistent pain, swelling, weakness or reduced movement, it is natural to want to know what is happening inside the affected area. A physical assessment and discussion about your symptoms will often provide a physiotherapist with important information. In some situations, diagnostic ultrasound can add another layer of detail by allowing certain muscles, tendons, joints and other soft tissues to be viewed during an appointment.
Ultrasound is not automatically needed for every musculoskeletal problem. It is one tool that may be considered when the findings could help clarify the assessment, guide treatment or support a more informed decision about what to do next.
What is a musculoskeletal ultrasound scan?
Diagnostic ultrasound uses high-frequency sound waves to create images of structures beneath the skin. As the sound waves pass through the body, some are reflected by different tissue layers. The ultrasound scanner receives these echoes and turns them into an image for the clinician to interpret.
Unlike an X-ray, ultrasound does not use ionising radiation. It is commonly used to examine accessible soft tissues, including muscles, tendons and some joint-related structures. Depending on the area being assessed, it may help a clinician look more closely at a painful or swollen region and compare it with the surrounding tissues or the opposite side.
The scan is usually performed with the patient in a comfortable position. A small amount of gel is applied to the skin, and the clinician moves the ultrasound probe across the area being assessed. They may ask you to move the joint or contract a muscle so that the tissues can be considered in relation to movement.
A scan is not usually painful, although the probe may pass over an area that is already tender. You should tell the clinician if you are uncomfortable so that the assessment can be adapted.
What can diagnostic ultrasound show?
The exact information available depends on the body area, the tissue being examined and the quality of the images. In appropriate situations, ultrasound may help assess:
- Tendons and tendon-related problems
- Muscles and some muscle injuries
- Certain ligaments and soft-tissue structures
- Fluid-filled areas around a joint
- Changes in the appearance or thickness of accessible tissues
- The location of a painful or inflamed-looking area
- Structures that may be relevant when planning an injection
Ultrasound can also allow the clinician to observe tissues while a joint or muscle is moving. This may be useful when symptoms are affected by a particular position, load or movement rather than being present all the time.
However, ultrasound cannot show every structure equally well. Some parts of the body are deeper or more difficult to assess, and ultrasound is not always the most appropriate form of imaging. For some questions, an MRI scan or another investigation may provide more useful information.
This is why the scan should be interpreted alongside your symptoms and physical assessment, rather than treated as a complete answer on its own.
When might an ultrasound scan be useful?
A diagnostic ultrasound scan may be considered when a clinician needs more information about a suspected soft-tissue problem. Examples may include:
Ongoing tendon pain
Tendon pain around areas such as the shoulder, elbow, knee or ankle can have several possible contributing factors. Ultrasound may help assess the tendon and support a clearer discussion about rehabilitation, activity modification or other treatment options.
A suspected muscle injury
Following a sudden injury, ultrasound may provide information about an accessible muscle or soft-tissue area. The findings may help inform how activity is progressed and whether a more cautious rehabilitation plan is appropriate.
Localised swelling or a lump
If there is a specific area of swelling or a change that needs further assessment, ultrasound may help identify the tissues involved. Any new, unexplained or concerning change should be discussed with an appropriate healthcare professional.
Persistent symptoms that have not improved as expected
If symptoms have continued despite an appropriate period of self-management or rehabilitation, additional information may be helpful. An ultrasound scan may be considered if the result could change the next stage of assessment or treatment.
Planning an injection
Ultrasound can help a suitably trained clinician identify relevant anatomical structures and guide certain injection procedures. This may support accurate placement, although whether injection therapy is appropriate depends on the whole clinical picture.
Does everyone with musculoskeletal pain need a scan?
No. Many common musculoskeletal problems can be assessed and managed without imaging. A thorough history and physical examination may provide enough information to begin an appropriate treatment plan.
Imaging can also show changes that are not responsible for a person’s symptoms. Finding something on a scan does not automatically mean that it is the cause of pain, and a scan result does not predict exactly how quickly someone will recover.
The most useful question is not simply, “Can I have a scan?” It is:
“What decision would this scan help us make?”
If the answer is unclear, immediate imaging may not add meaningful value. A clinician may instead recommend a period of rehabilitation, monitor your response to treatment and review the situation if progress is slower than expected.
How do ultrasound findings inform treatment decisions?
The scan is most useful when it contributes to a wider clinical reasoning process. Your physiotherapist may consider:
- What you felt when the problem began
- How your symptoms behave during daily activities, work or sport
- The results of your physical assessment
- Your strength, movement and functional capacity
- How long the problem has been present
- Whether symptoms are improving, stable or worsening
- What matters most to you in recovery
The ultrasound findings may then help refine the plan. For example, they might support a programme focused on gradual tendon loading, provide information about the stage of a muscle injury or help identify whether a particular structure should be protected while it settles.
In other situations, the scan may reassure both patient and clinician that a suspected serious soft-tissue problem is less likely. It may also indicate that a different investigation or referral should be considered.
The scan does not prescribe treatment by itself. Two people with similar-looking findings may need different plans because their symptoms, goals, physical capacity and circumstances are different.
Ultrasound and injection therapy
Diagnostic ultrasound and injection therapy are related but separate services. An ultrasound scan may be used to examine an area before deciding whether an injection is appropriate. It can also be used to guide the needle during some procedures.
An injection should not be viewed as a replacement for assessment or rehabilitation. The potential benefits, limitations and risks should be discussed before treatment, and the decision should take account of your diagnosis, symptoms, previous treatment and goals.
Where an injection is being considered, ultrasound may help the clinician plan the procedure with a clearer understanding of the relevant anatomy. After an injection, an appropriate rehabilitation plan may still be important for restoring movement, strength and confidence.
What should you expect during an appointment?
Your appointment will usually begin with questions about your symptoms and a physical assessment. The clinician may ask when the problem started, what makes it better or worse, and how it affects your work, exercise, sleep or everyday activities.
If an ultrasound scan is appropriate, you may be asked to expose the area being assessed while maintaining your privacy and comfort. Loose clothing can make this easier. For lower-limb problems, shorts may be useful.
During the scan, the clinician may explain what they are examining and ask you to change position or move the affected area. You should have the opportunity to ask questions and discuss what the findings mean for your next steps.
A report or explanation should be considered in the context of your symptoms and assessment. If you are unsure about anything you have been told, ask for clarification.
When should you seek assessment?
Arrange an assessment if pain, weakness, swelling or restricted movement is interfering with your normal activities, exercise or sleep, particularly if it is not improving as expected. Prompt medical advice may be appropriate following a significant injury, sudden loss of function or rapidly increasing swelling.
A scan is not always the first step. A qualified clinician can help decide whether diagnostic ultrasound is likely to answer a useful question, whether another form of imaging is more suitable or whether rehabilitation and monitoring are the better starting points.
Diagnostic ultrasound is most valuable when it helps connect the information from your symptoms, examination and goals to a practical treatment decision.
No. Diagnostic musculoskeletal ultrasound is used to assess structures such as muscles, tendons and other soft tissues. The type of scan and the information being sought are different.
It may provide useful information about particular tissues, but it cannot identify the cause of every type of pain. Scan findings need to be interpreted alongside your history and physical assessment.
Neither is automatically better. They provide different types of information and are suitable for different clinical questions. A clinician can help decide which investigation, if any, is appropriate.
Patients can self-refer for ultrasound scans and injection therapy appointments. An assessment will still be needed to determine whether an injection is appropriate for your problem.
Book an appointment
If you would like advice about a musculoskeletal problem or whether diagnostic ultrasound may be useful, book an appointment with Great Northern Physiotherapy.
Book an appointment, call 01522 787164 or email hello@greatnorthernphysiotherapy.co.uk.
Related Services
Related Articles
-
When Is an MRI Scan Useful for Musculoskeletal Pain?
An MRI can provide valuable information about muscles, tendons, joints, discs and other soft tissues. Find out when it may help and why clinical assessment is often the first step.
-
Ultrasound Scanning and Injection Therapy
What is an ultrasound scan? Ultrasound is a very high frequency vibration or sound wave that is passed into your body. As it passes through the tissues, a proportion of the wave is reflected from each of the layers of tissue. The scanner picks up the returning sound waves and processes them into an image.…