How long can the arm recover after removing the cast needs to be decided according to the patient’s own situation, and the general recovery time is about 4 weeks. If the joint is stiff and the degree of fracture is light after the arm cast is removed, the patient can recover in about 1~2 weeks if the fracture is more serious and the patient does not actively carry out functional exercises, the normal recovery time is usually 3~4 weeks. Joint swelling after removing the arm cast, may be due to poor venous return or tissue fluid penetration into the tissue space resulting in swelling, after functional exercise, usually 3~4 weeks recovery. If the arm cannot be straightened after the arm cast is removed, it may be because the joint is in a state for a long time, which restricts the movement of the joint, and there is ankylosis of the joint, which is usually recovered in 3~4 weeks after functional exercise. If there is any discomfort after the arm cast is removed, it is recommended to consult a specialist clinic in time to complete the relevant examinations.