Itchy plaster can be removed and re-bound and tied after cleaning the skin. The cast is lined with cotton or plaster cotton, the cotton and plaster cotton will affect the skin heat dissipation and sweating, and the sweat at the sweat pores will be deposited locally after a long time, which will stimulate the skin and cause itching. After the fracture is fixed and the bone scab grows and does not shift, the patient should untie the bandage, remove the plaster rest or plaster clip, clean the skin with water and soap and water, and then put the cast on.