The distal fibula is the lower part of the fibula bone. A cast is often used to treat a distal fibula fracture. Swelling may occur as a result of a fractured distal fibula. Feet are able to pivot because of the ankle joint, which is made up of the tibia and talus, along with the distal fibula.he distal fibula is the lower portion of the fibula, located at the ankle. Feet are able to pivot because of the ankle joint, which is made up of the tibia and talus, along with the distal fibula. The tibia is on the inside of the ankle, and the talus is at the bottom of the ankle.