If the cast is removed after a wrist fracture, it will still take 1-2 months for the swelling to go down completely because the fracture in the wrist is not completely healed when the cast is removed and the collateral circulation around it is not fully established. As a result, localized swelling is likely to occur when the hand is lowered or the wrist is moved. Generally, after about 3 months, the fracture will reach complete bony healing, very strong healing, with the gradual functional exercise after removing the cast, the activity will gradually increase, the human body will gradually tolerate the local venous return slowing down, and the collateral circulation will be gradually built up, so the swelling can be gradually reduced after about 1-2 months. However, there are also special cases, such as some fractures do not heal well, with delayed healing or non-healing, some fractures are more serious comminution, and the surrounding soft tissue damage is more serious, which will lead to the localized swelling still exists 2-3 months after removing the cast, and the human body needs to tolerate it gradually, and gradually build up the collateral circulation, and the surrounding soft tissues are gradually repaired, so that the swelling can be gradually reduced.