Diagnosing peroneal tendonitis

The peroneal tendons run behind the outer ankle and help control the foot during walking and balance. The clinician asks about running, uneven ground, ankle sprains, footwear, and whether pain increases with activity. They look for tenderness behind or below the outer ankle, swelling, snapping, and changes in walking. Resisted outward foot movement and single-leg balance may reproduce symptoms. The assessment also considers a lateral ligament injury, stress injury, or pain referred from elsewhere.

Reduce the activity that provokes pain, particularly repeated running, jumping, or uneven-ground walking, while keeping comfortable movement. Wear the support recommended after examination and avoid repeatedly testing the painful tendon. Ultrasound can show tendon movement and structure; MRI may be considered when a tear or another diagnosis is suspected. Physiotherapy may address ankle mobility, balance, calf capacity, and gradual Strength Training Rehabilitation. Shockwave Therapy or PRP Injection may be discussed in selected persistent cases, not assumed before assessment.

Seek prompt care after an ankle injury if you cannot bear weight, the ankle looks deformed, or pain and swelling are severe. Urgent review is needed for a cold or numb foot, rapidly increasing swelling, or a tendon that suddenly snaps with loss of movement. Arrange assessment for outer-ankle pain that persists, repeatedly gives way, or worsens despite reducing the triggering activity.

Ask whether the symptoms fit tendon irritation, a tendon tear, or a ligament problem, and whether imaging is useful. Discuss footwear and activity changes, the starting point for Physiotherapy, and how progress will be measured before returning to impact exercise.