For this kind of "back pain", the best treatment is to insist on doing the "swallow" action: lie face down on the bed, then put your arms behind your back, while keeping your knees straight, then lean back, lift your legs and let your two ends leave the bed for a while. Director Sun said that the most important thing in this kind of exercise is persistence. If you can do it twice a day for a few minutes, you can see the effect in two or three months.