If a leg fracture is in a cast, and if the leg fracture is followed by surgery, the cast is only a secondary immobilization and is usually removed in 3-4 weeks time. If the leg fracture was not operated on, the cast is the main form of immobilization and usually takes 8-12 weeks. During this time x-rays are needed to see the location of the fracture and how it is healing. Before removing the cast, X-rays must be performed to prove that the fracture has reached stability and the cast can be removed; otherwise, the fracture is prone to displacement. In addition, during the process of plaster immobilization, you need to pay attention to the tightness of the plaster. If it is too loose, it will lose its fixation effect and the fracture will be easily displaced. If it is too tight, it will cause some damage to the blood vessels, nerves and muscles. Gypsum fixation is a common way of fixation in fractures and the effect is relatively accurate.