Tendinopathy is an injury to the tendon. It can cause pain, swelling, and limited movement. The injury can include:
1) Tendonitis—inflammation of the tendon
2) Tendinosis—tiny tears in the tendon tissue with no significant inflammation
3) Tendon Subluxation – dislocating/snapping of tendon out of place



The peroneal tendons run along the outside of the ankle bone. Treatment depends on the severity of the injury.



Peroneal tendinopathy often occurs as a result of:

  • Repetitive overuse injuries which may occur from regular activities

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  • Trauma to the ankle such as a sudden twisting of the ankle or foot

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  • An inversion sprained of the ankle
  • Overstretching the foot

Factors that increase your risk of peroneal tendinopathy include:

  • High arched foot
  • Previous ankle sprain or injury
  • Weak ankles

Symptoms include pain, tenderness or swelling along the side of the foot or side of the ankle. There may also experience weakening or instability in the foot or ankle.

Radiography is the first-line study for excluding fractures of the lateral malleolus or calcaneus or arthritis. Magnetic resonance imaging (MRI) is the criterion standard for identifying peronea l tendon.

Pathology. Ultrasonography is useful for detecting all types of peroneal lesions. In particular, real-time ultrasonography can be performed to assess dynamic stability. Computed tomography (CT) scanning is useful for evaluating bony irregularities and suspected fractures, particularly in the calcaneus.

Treatment depends on the type of peroneal tendon injury.

  • Immobilization . A cast, splint, or brace may be needed. They will help keep your foot and ankle from moving to let the tendon rest. You may also be asked to wear special shoes or inserts
  • Medications. Over-the-counter pain relievers, such as acetaminophen or non-steroidal anti-inflammatory medication (NSAIDs), Prescription pain relievers, Corticosteroid injections
  • Physical therapy . Ice, heat, or ultrasound therapy may be used to reduce swelling and pain. As symptoms improve, exercises can be added to strengthen the muscles and improve range of motion and balance.
  • Bracing. The surgeon may provide a brace to use for a short while or during activities requiring repetitive ankle motion. Bracing may also be an option when a patient is not a candidate for surgery.
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Surgery may be needed in some cases. It can help to repair the tendon or adjust support structures of your foot.

Split in the peroneus brevis


Repair split in peroneus brevis


To help reduce your chance of getting peronea l tendinopathy, take the following steps:

  • Avoiding activities and sports that repeatedly stress the ankle
  • Do not put yourself at risk for trauma to the ankle
  • Build strong muscles to support your joints
  • Gradually increasing the frequency and intensity of exercise
  • Learn proper technique for sports and exercise