When do you need an ultrasound for pain that won't go away?
If a tendon, muscle or joint has hurt for weeks and doesn't improve with rest, or the pain returns every time you resume activity, an ultrasound can help you understand what is going on.
Ultrasound lets us see the state of tendons, muscles and ligaments in real time, compare with the other side and decide which treatment makes most sense.
It isn't always needed: many injuries can be assessed well with the clinical history and examination. But when the diagnosis is unclear or the pain is persistent, it provides useful information.
If you have severe pain after a blow, significant swelling or can't bear weight, see a doctor or the emergency department first.
When it makes sense
- The pain has lasted more than three or four weeks without clear improvement.
- It returns every time you resume sport or activity.
- A tendon, muscle or ligament injury is suspected.
- You want to be sure the treatment is the right one before starting.
When it is not needed
In many cases a good clinical history and examination are enough. Ultrasound does not replace an X-ray or an MRI when those tests are indicated; it is decided case by case.
What ultrasound shows
Tendons, muscles, ligaments, superficial nerves and joint fluid. It lets us see in real time whether there is thickening, a partial tear or inflammation, and compare with the other side. It also guides the technique when we do a needling or EPI, so we reach exactly the right point.
When to see a doctor or go to A&E first
- Severe pain after a blow or a fall.
- Deformity or major swelling.
- You cannot put weight on the foot or move the arm.
- Fever, increasing numbness or loss of strength.
- Chest pain or shortness of breath.