If you’ve ever had physiotherapy, you may have come across a machine that looks like a small handheld scanner being moved over your skin with some gel.
That’s therapeutic ultrasound, often shortened to USS.
It might look similar to the ultrasound used during scans, but the purpose is completely different. So what is it actually doing, and why might your physiotherapist use it?
At PhT Therapy, therapeutic ultrasound is one of the treatment options we may use as part of a wider physiotherapy programme.
First Things First: It’s Not a Scan
The word “ultrasound” can be confusing because there are actually different types.
Diagnostic ultrasound uses high-frequency sound waves to create images of structures inside the body. It is used by healthcare professionals to look at things such as muscles, tendons, ligaments and organs.
Therapeutic ultrasound, on the other hand, does not produce an image.
Instead, the ultrasound head is moved over the affected area to deliver sound-wave energy into the tissues.
So, one is mainly used to look, while the other is used as a treatment modality.
So What Does Therapeutic Ultrasound Actually Do?
Therapeutic ultrasound uses sound waves that are above the range of human hearing. These waves travel into the tissues and can produce mechanical effects and, depending on the settings used, thermal effects.
The aim is generally to help:
- Reduce pain
- Improve tissue mobility
- Support circulation around an area
- Reduce muscle spasm
- Prepare tissues for other forms of treatment
The exact effect depends on the settings, treatment area, and the condition being treated.
Importantly, ultrasound isn’t a magic button that fixes an injury on its own. We use it as one part of a wider treatment plan.
What Does the Research Say?
This is where things get interesting.
Research on therapeutic ultrasound is mixed. Evidence does not support using ultrasound for every injury or assuming that it will speed up healing in every situation.
Some studies have found benefits for pain and function in certain musculoskeletal conditions, while other research has found little additional benefit compared with exercise or other treatments.
This is why at PhT Therapy, we don’t automatically use ultrasound for everyone.
We consider the person’s symptoms, diagnosis, stage of recovery, and overall treatment plan before deciding whether it is appropriate.
In other words, evidence-based physiotherapy isn’t about using a treatment because we have the machine. It’s about using it when there is a reasonable clinical reason to do so.
What Conditions Might We Use It For?
Therapeutic ultrasound may be considered as part of treatment for certain soft tissue and musculoskeletal problems.
Tendon problems: Some patients with tendinopathies may have ultrasound incorporated alongside progressive strengthening and other rehabilitation.
Muscle injuries: It may be used during rehabilitation for certain muscle strains, particularly when pain or tissue sensitivity is limiting movement.
Joint and soft tissue pain: In some cases, ultrasound may be used to help settle symptoms and make other treatments more comfortable.
Scar tissue: Depending on the stage and characteristics of the scar, ultrasound may sometimes be used alongside other techniques to improve tissue mobility.
Chronic soft tissue problems: Some longer-standing conditions may benefit from ultrasound as an adjunct to a broader rehabilitation programme.
The important point is that the treatment is condition-specific. What works for one person may not be appropriate for another.
What Does a Session Feel Like?
Most people find therapeutic ultrasound very comfortable.
A small amount of gel is applied to the skin and the ultrasound head is gently moved over the treatment area.
Depending on the settings, you may feel:
- Little or nothing
- A gentle warmth
- Mild pressure from the treatment head
It shouldn’t be painful. If something doesn’t feel right, your physiotherapist will adjust the treatment.
Some Everyday Problems We Treat
At PhT Therapy, therapeutic ultrasound may be used alongside other treatments for conditions such as:
- Shoulder and rotator cuff problems
- Tennis elbow
- Wrist and hand pain
- Knee pain
- Achilles and other tendon problems
- Muscle strains
- Some soft tissue injuries
- Scar and tissue mobility problems
But you’ll rarely see us simply put the machine on and send you home.
That’s because ultrasound is only one piece of the puzzle.
Where Does PhT Physio Come In?
This is where physiotherapy becomes more than just a machine.
We first assess what’s causing your symptoms and how the problem is affecting your movement and function.
Depending on what we find, treatment might include:
- Manual therapy
- Joint mobilisations
- Exercise therapy
- Strength and conditioning
- Movement retraining
- Education
- Taping
- Therapeutic ultrasound where appropriate
For example, someone with shoulder pain might receive ultrasound to help settle symptoms, followed by specific strengthening exercises to address the underlying weakness.
The goal is always to get you moving better and functioning better, rather than relying on a passive treatment alone.
So, Is Ultrasound Worth It?
Therapeutic ultrasound can be useful for certain patients and conditions, but it isn’t suitable for every injury and it shouldn’t replace active rehabilitation.
We use it selectively and alongside other evidence-informed physiotherapy treatments when we believe it can benefit your recovery.
If you’ve had an injury that isn’t settling, don’t try to work out whether you need ultrasound yourself. A proper assessment can help determine what’s actually going on and which treatment approach is most appropriate for you.
Not every injury needs ultrasound. But when it’s the right treatment for the right person, it can be a useful part of the bigger picture.
