It takes at least 4 to 6 weeks to remove the pin from a child’s left leg after a fracture, depending on the results of a follow-up examination. Children’s fracture heals faster than adults’, about 4~6 weeks. The pins can be removed after a follow-up examination to confirm that there is scab growth and that the fracture has healed well, for example, by X-ray. Removing the pin too soon may cause the fracture to become unstable and risk re-displacement. Children should pay attention to the condition of the incision after the pin is removed from the left leg fracture, and consult the doctor promptly if infection occurs. After the fracture, pay attention to rest, eat more protein-rich food such as eggs, beef, etc., which is conducive to recovery. After the child’s left leg fracture is immobilized with pins, the child should have regular checkups and follow the doctor’s advice to choose the appropriate pins.