The need for hospitalization after fracture in a cast should be decided according to the site and type of fracture. If there is any vascular and nerve side injury after fracture, such as fracture of lower leg, mid calf fracture, transverse fracture and more stable fracture with good alignment and alignment after cast, it can be kept in emergency or outpatient clinic without obvious swelling and vascular and nerve side injury does not require hospitalization. If there is vascular and nerve injury, limb movement dysfunction, sensory numbness and poor peripheral blood flow require hospitalization for observation and treatment, and vascular and nerve repair surgery in severe cases.