Minor bone fracture cast, need to be combined with the fracture site and individual physique to determine, generally 4~6 weeks can be removed. Minor bone fracture is no displacement, just simple bone cortical fracture, small damage to the surrounding soft tissue, general cast fixation 4~6 weeks, fixation time is too long easy to cause joint stiffness, too short a period of time, easy to cause displacement of bone fracture. Generally 3 weeks after the fracture is the period of primitive bone scab formation, and after another 3 weeks the bone scab can resist the rotation of the limb and gravity to prevent displacement. If a child has a limb fracture, it may require 4 weeks of immobilization, whereas in adults it may be 4 to 6 weeks. After the cast is removed, it is also important to avoid excessive weight-bearing activities to minimize irritation to the fracture end. If a minor bone fracture is diagnosed, it is recommended to go to the hospital in time for standardized treatment under the guidance of a doctor.