Peroneal tendonitis is an overuse injury that happens in athletes. It can be a very persistent problem if not managed properly. The function of the peroneal muscles on the outside of the leg function to support the function of the foot on the ground and stop the foot from supinating or rolling outward at the ankle joint. This means that peroneal tendonitis is more common in those that want to roll outwards more at the ankle joint such as those with a higher arch profile. The symptoms tend to be in the tendons just about or just below the outer ankle bone (lateral malleolus). Only sometimes is there any swelling in the early stages.
How to manage peroneal tendonitis:
First the running has to be modified to reduce activity levels to a level that can be tolerated. Another activity such as swimming and cycling can be substituted to maintain fitness. ICE and other physical therapies can be used after the activity. The key to managing peorneal tendonitis is to use a lateral heel wedge, probably made of a rubber, in the shoe that is higher on the outside to stop the foot from wanting to roll outwards. This means that the peroneal muscles do not have to work as hard.
When to see the doctor:
When the above does not help, see the doctor.