The foot is still swollen even after the plaster is removed, mainly because the foot is immobilized in plaster and is in the state of braking and resting for a long period of time, which leads to the obstruction of the venous blood return of the lower limbs, and produces venous stagnation and swelling of the foot. Due to the long time cast fixation, the foot is in the state of braking and resting for a long time, the muscle strength of the leg and foot is obviously weakened, and the local veins appear to have insufficient power, atrophy and other states. When the cast is removed, the venous blood return of the lower limbs will be blocked, and the local blood circulation will be poor, thus producing venous stagnation and swelling. There may be other reasons why the foot is still swollen after the cast is removed, such as poor fracture healing and heavy exercise. If the swelling is not relieved, or accompanied by pain, it is recommended to go to the regular hospital in a timely manner to improve the relevant examination, to clarify the cause of the disease, under the guidance of the doctor to carry out targeted treatment or treatment.