After the cast is fixed, the following precautions should be taken: 1. After the cast is fixed, the position of the limb where the fracture is fixed should be elevated above the level of the heart, which can effectively reduce the formation of swelling and edema and promote the recovery of the fracture. 2. After the cast is fixed, the distal blood flow, sensation and other painful symptoms of the foot and hand must be closely observed, and if there is If the finger turns white or purple, and there is an obvious numbness, this is usually due to the protruding position of the cast, which causes compression of the nerves or blood vessels of the limb, so it is necessary to release the cast immediately, look at the location of the compression, and then re-plaster. 3. This is not scientific, because it will lead to stress reaction of the fracture end, resulting in non-healing or delayed healing of the fracture.