Peroneal tendinitis is an overuse injury involving the two tendons that run along the outside of the ankle and down into the foot. These tendons, the peroneus longus and peroneus brevis, help stabilize the foot and protect it from sprains.
The pain associated with this condition is usually localized to the lateral (outer) side of the ankle and foot.
A dull ache or sharp pain along the outside of the ankle during activity.
Swelling or warmth behind the lateral malleolus, which is the bony bump on the outer ankle.
Pain that worsens with eversion, or turning the foot outward against resistance.
A feeling of instability or weakness when standing on the toes or changing directions.
Point tenderness directly over the path of the tendons.
Physical Examination
X-rays: Used to rule out fractures or a bony prominence that might be rubbing against the tendon.
MRI or Ultrasound: These are the preferred tools for seeing thickening, fluid buildup, or small tears within the tendon itself.
Recovery focuses on reducing the load on the lateral side of the foot to allow the inflammation to subside and is similar for tendinitis and tears of the tendon.
Resting from high-impact activities like running or jumping.
Icing the outer ankle for 15 to 20 minutes several times a day.
Non-steroidal anti-inflammatory drugs to manage swelling and pain.
Physical therapy to strengthen the peroneal muscles and improve ankle balance.
Lateral heel wedges or orthotics to correct foot alignment and reduce tendon tension.
Stretching the calf muscles to decrease the overall mechanical pull on the foot.
Bracing or taping to provide external support during the initial return to activity.
Platelet rich plasma (PRP) injections are an option if there is a tear in the tendon.