Peroneal Tendonitis is the inflammation of one or both of the peroneal tendons. These tendons stabilise the foot and prevent the ankle from spraining. They also allow you to turn your foot outwards. Both tendons are connected to the calf muscle – with one joining to the inner foot from the big toe, and the other to the outer foot from the little toe. They run down the back of the calf, past the outside of the ankle then split into two.
Peroneal Tendonitis is the inflammation of these tendons, causing pain around the back and outside of the foot.