The peroneal tendon is located on the outside of the ankle, behind the fibula. Peroneal tendonitis is an inflammation of the peroneal tendon, largely due to overuse and increased stress as a result of repetitive activities. Typically seen in athletes that run and jump, especially marathon runners, peroneal tendonitis is also common in people who suddenly increase the intensity of their workouts or have ineffective footwear. This condition may also be the result of other injuries to the ankle, including sprains.
Symptoms include pain in the back and towards the outside of the ankle. As this is an overuse injury, the pain is not usually related to a specific instance. There may also be mild swelling, tendons that are sore to the touch and constant pain, especially with movement.
Peroneal tendonitis is initially diagnosed with an oral history, during a doctor visit. Additionally, there will be pain with applied pressure and maneuvering of the peroneal tendons. X-rays of the bone structure and ultrasound of the tendons are also used for diagnostic purposes.
Treatment options include rest, ice, shoe modification, anti-inflammatory medications, physical therapy, orthotic devices and stretching exercises. With increased reports of pain, a walker boot is recommended. Surgery is rarely used, as peroneal tendonitis is an overuse, repetitive movement injury- the most effective treatment is rest.