After the fracture is removed from the cast, it is proved that the fracture is basically able to achieve clinical healing, and then the cast can be removed and the functional exercise of the limb can be started, in which case hot compresses can be applied. Hot compresses have certain benefits for the fracture localization, can promote local blood circulation, accelerate the local soft tissue repair, especially can accelerate the blood circulation of the fracture end, accelerate the healing of the fracture. If there is swelling at the end of the fracture, it can also promote the swelling to subside. If the fracture end is close to the joint position of the joint adhesion, more hot compresses can also promote the local adhesion loosening, promote the mobility of the joints, and is conducive to the later activities of the joints or limbs of the functional exercise.