Distal ulnar radius fracture is generally referred to as a fracture of the distal radius, there is no clinical data to prove how long to keep a cast on a distal radius fracture, usually patients need to be immobilized in a cast for about 4 weeks. Distal radius fracture is mostly due to direct violence, indirect violence and other factors. Patients can take plaster immobilization under the guidance of the doctor, so as to play a role in local braking, controlling the development of the disease and relieving the symptoms of the disease. There is no authoritative information on how long a distal radius fracture needs to be immobilized in a cast. Usually, the cast immobilization time is around 4 weeks, but due to the different conditions of individuals, some patients with comminuted fracture have a relatively longer cast immobilization time of around 6 weeks, so it is not possible to make a generalization. During the period of plaster immobilization, patients with distal radius fracture need to ensure sufficient rest and do not over keep. Keep the local area clean and dry to avoid secondary infection. At the same time, you can do outdoor activities appropriately, get more sunshine, and supplement foods rich in vitamin D. You can eat more fresh fruits and vegetables.