What is it?

Peroneal tendonitis is inflammation in the tendons that run along your outer ankle bone and the side of your foot. These tough bands of tissue connect the muscles in your lower leg to the bones in your foot. They help stabilize and balance your foot and ankle, protecting them from injuries.

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Signs & symptoms

Symptoms of peroneal tendonitis may include:
* Ankle pain along the length of your tendon.
* Pain that gets worse with physical activity.
* Swelling, redness or warmth around your tendon.
* Thickened tendons, with a mass or nodule that moves with your tendon.


Peroneal tendonitis can be difficult to diagnose. The symptoms are similar to those of other foot and ankle problems, like sprains, arthritis and fractures. One study suggests that out of 40 people with peroneal tendonitis, about 60% were initially misdiagnosed.
The doctor will perform a physical exam and review your symptoms, though. They may palpate on certain parts of your foot and ankle to check for swelling or tenderness. Your provider might also ask you to perform certain ankle movements to evaluate the range of motion in the joint.
Sometimes imaging is necessary to make sure you don’t have a foot fracture, osteoarthritis, cartilage damage or torn tissue. Your provider might recommend an X-ray, MRI, CT scan or ultrasound, as well.


Conservative treatments usually help relieve tendon pain and inflammation within three to four weeks. Recovery might take longer if tendonitis is the result of another injury, such as a sprain.
Common treatments for peroneal tendonitis include:
* Bracing
* Immobilization
* Medication
* Physical therapy
* RICE method: You can perform RICE (rest, ice, compression and elevation) at home. Rest by avoiding strenuous activities. Apply an ice pack or cold compress to your ankle for 20 minutes every two hours. Wrap your ankle in a compression bandage to reduce swelling and keep your ankle elevated, preferably above the level of your heart.

If peroneal tendonitis doesn’t improve with conservative treatments, you might need surgery. Surgery consists of cleaning out the damaged outer layers of tissue from your peroneal tendons during a procedure called a synovectomy. Some people may be candidates for a minimally invasive synovectomy, which involves smaller incisions (cuts) and a faster recovery.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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