A cast is not required to reduce swelling first; if the limb is swollen, external fixation in a cast can still be performed first. Symptomatic treatment to reduce swelling, such as oral horse chestnut seed extract tablets, is also used. Braking and elevating the affected limb to promote venous return. Oral medications can also be used to promote blood circulation, relieve swelling and pain, such as Bone Injury Recovery Pill and other herbal medicines. However, it is also necessary to observe the peripheral blood circulation. If once the patient feels that the skin temperature of the limb has decreased and the cast is too tight, it may be caused by increased swelling. At this time, we should go to the hospital for review in time, and once the cast is found to be too tight, we should replace the cast external fixation. Make the cast always keep in a loose and stable state. Because if the cast is too tight to squeeze the limb, it is easy to make the limb produce the symptoms of local necrosis.