The bones on either side of the ankle are called the medial and lateral ankle, which are prominent bony landmarks that can determine the location of the joint gap. Also, these two bony parts are prone to fractures during walking, such as the fracture of the outer ankle in the inversion position and the fracture of the inner ankle in the valgus position. The medial ankle is attached by the medial triangular ligament, whereas the lateral ankle is attached by the anterior talofibular ligament, posterior talofibular ligament, and heel-fibular ligament. External ankle fractures are more common than internal ankle fractures, mainly because the external ankle ligaments are easily strained and the patient is prone to inversion sprains when going down steps, whereas external sprains are less common, and the strength of the medial deltoid ligament is much higher than that of the lateral collateral ligament, so internal ankle fractures are relatively rare.