As a lumbar back brace, the main medical role of the lumbar brace is braking, which is to limit the flexion of the lumbar vertebrae and other activities; secondly, the protective role, after wearing the lumbar brace, reduces the lumbar activities, thus playing a protective role for the lumbar vertebrae and strengthening the stability of the lumbar vertebrae. The purchase and production of lumbar circumference or lumbar back support should generally be based on the basic principle of whether it is comfortable to wear and whether it can play a protective role. Patients should pay attention to the following points when using: 1. The specifications of the lumbar girth should be compatible with the length and circumference of their own waist, and its upper edge should reach the lower edge of the ribs and the lower edge to below the hip crack. The upper part shall keep the waist flat, and the lower part shall conform to the curve of the hip, and it is best to reinforce it vertically with steel support strips or spring plates. The lumbar girth should be worn to avoid excessive lumbar lordosis, while a narrow girth may increase lumbar lordosis. In addition, in order to avoid wearing too tight, you can choose a good elastic elastic waistband. 2, the time to wear the waist circumference should be appropriately grasped according to the condition. When the lumbar symptoms are heavy, such as wearing no discomfort, should be worn often, do not take off at any time, and can be carried out with traction, physical therapy, massage and other treatments. When the disease is mild, you can wear it when you go out, especially when you need to sit in one position for a long time (such as when you go out by car), and you can lift the waist circumference when you sleep or rest. After the waist symptoms disappear, you should not wear a waist bra anymore. 3. You should still pay attention to your waist activities after wearing a waist brace. Since the waist brace only restricts the activities of the waist in terms of flexion, etc., and does not reduce gravity, excessive activities of the waist should be avoided. Generally, the simple activities of daily life and work should be completed. 4.During the use of waist circumference or lumbar back support, exercises for the lumbar back muscles and abdominal muscles should be carried out under the guidance of a doctor to prevent and reduce disuse atrophy of the muscles concerned and to adapt to activities without the protection of waist circumference or lumbar back support. 5.Wearing time of lumbar girth. In principle, wearing a waist brace for 3-6 weeks is appropriate, with the longest period not exceeding 3 months. And during sleep, rest and no pain or mild pain, the waist brace should be removed appropriately for a period of time to actively create conditions for the complete withdrawal of the waist brace later.