Tendonitis

Also called Tendinopathy, Tendinitis, or Achilles tendinopathy

Tendonitis is when a tendon, the tissue that connects muscle to bone, becomes painful and swollen. It often affects the shoulder, elbow, wrist, knee or the Achilles tendon at the back of the ankle. It is usually caused by overuse or repetitive movements, often in sport or work, and becomes more common with age.

Last updated Nov 9, 2026

What it is

It usually gets better within a few weeks with rest, ice and painkillers, followed by gradual strengthening exercises.

If it does not improve, physiotherapy, shockwave therapy or, sometimes, injections may be offered.

Common signs

  • Pain in a tendon that gets worse with movement
  • Difficulty moving the joint
  • A grating feeling when moving the tendon
  • Swelling, sometimes with heat or redness
  • A lump along the tendon

How it is usually diagnosed

  • Questions about symptoms and an examination
  • Sometimes an ultrasound or MRI scan

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • GP or physiotherapy notes
  • Ultrasound or MRI reports
  • Sports medicine or orthopaedic letters

Questions to ask your doctor

  • How long should I rest it?
  • Which exercises will help?
  • When can I return to sport?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A sudden snap or pop with severe pain and being unable to move the joint, such as at the back of the ankle: get urgent help the same day

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources