Peroneal Tendonitis is an uncommon issue with the tendons on the outside of the rearfoot. The problem almost always occurs in athletes in which the stresses on these structures are so a lot higher. There are 2 peroneal muscles on the of the lower limb whose tendons move round the outside of the ankle joint with one tendon attaching on the lateral side of the foot at the bottom of the fifth metatarsal. The other tendon passes under the foot to connect to an area close to the center of the arch of the foot. The peroneal muscles have many different functions, but a primary one is to counteract the rearfoot rolling outwards and ending up with a ankle sprain. Because they work hard at that task, the stress on the tendons might be too much for the tissue to tolerate and they are prone to peroneal tendonitis.

Commonly the tendonitis commences with discomfort either over or just beneath the lateral ankle bone without or with some mild swelling. In some the swelling develops later. With ongoing exercise the symptoms becomes more constant and progressively worse. A typical feature in those with peroneal tendinopathy is a decreased supination resistance. This means it is easy for the rearfoot to supinate or roll outwards. This will cause the peroneal tendons to be really active, so if you then combine it with higher level of athletic activity, then the tendon is at high risk for an overuse injury.

The treating of peroneal tendinopathy generally begins with minimizing the stress by lowering exercise levels and also the use of footwear wedging or foot orthoses to pronate or tip the feet inwards so the muscle does not have to work as hard. Ice and anti-inflammatory medicines may also help reduce the pain and swelling. Over the medium to long term increasing stress by the way of exercise should be put on the tendon in order that it can adapt to the stresses placed on it. In a few cases, surgery is recommended.