Generally speaking, cast removal indicates that the local tissue repair and healing have been completed, and the corresponding functional training can be carried out, even normal standing and walking on the ground. Due to the cast fixation and long-term resting condition, the local veins will be underdeveloped and atrophied, and when moving to the ground or standing and functional training, the blood return to the lower limbs will be blocked, resulting in swelling. In this case, the symptoms can be gradually relieved by training, restoring the local venous power and promoting local blood flow. Generally speaking, swelling occurs when the cast is removed for functional training, and after sleep or elevation of the affected limb for rest, the swelling will generally be significantly eliminated in the morning, and the swelling may gradually appear again when functional training is performed again. This is very common in clinical practice, and the symptoms can be relieved gradually by insisting on functional training. At the same time, you can also take appropriate supportive symptomatic treatment, including physiotherapy and oral Mizarin, Veritin, etc. to promote the recovery of venous power, which will help to reduce the swelling faster.