Whether a hand fracture can be removed from the cast at 1 month must be determined by the growth of the specific fracture as well as the location of the specific fracture. If the fracture is a phalangeal fracture or a tarsal fracture, it is usually possible to see a blurred fracture line or a growth of the bone scab in the review photographs in about 1 month, at which time the cast can basically be removed and the hand can be given functional exercises for mobility. However, if the fracture line is still very clear in the review photo, it is necessary to continue to apply the cast immobilization, and then review the photo after 2 weeks, and the cast can only be removed if the fracture line is blurred. In addition, if there is a fracture of the navicular bone of the hand, the blood circulation in this area is relatively poor, and the cast must be immobilized for about 10-12 weeks before it can be removed.