1, is twisting really the culprit of lumbar disc herniation? Yu: Violence during twisting can cause herniation of the lumbar disc as an external cause of injury to the structure of the disc, but usually there is a certain course from the twisting to the onset and the protrusion of the disc to cause symptoms. Sometimes in special cases, the traumatic violence is large enough to cause an acute protrusion of the lumbar disc immediately. 2.What is an acute herniated lumbar disc? What are the main symptoms? Yu: Acute lumbar disc herniation is mainly the acute phase of acute protrusion of the lumbar disc or recurrence of previous lumbar herniation due to trauma and other factors. The herniated disc may cause nerve edema and local inflammatory reaction due to the compression of the nerve, which may lead to pain, numbness, weakness and other symptoms in the lower back and lower limbs, and even sudden muscle strength changes in the lower limbs or urinary and fecal disorders. 3.How should I give first aid after flashing back? Yu: the general occurrence of acute lumbar sprain, the first must be bed rest, a short period of time to minimize lumbar activities. At home, you can also apply hot compresses to the injury. Severe cases can go to the hospital for consultation. For a long time not to heal or even the appearance of lower limb symptoms, be sure to go to the hospital in a timely manner to prevent delayed illness. 4.Why must be lying down, whether it must be a hard bed? Yu: After lying flat on the one hand to relieve muscle tension, on the other hand basically eliminates the pressure of the lumbar disc, so that the risk of disc herniation is minimized. The current view is not necessarily a hard bed, but a bed with a certain degree of hardness can be, can be a soft bed is not suitable for recuperation and recovery. 5, then in daily life, how should I prevent flash back? Yu: acute lumbar sprain, commonly known as “twisted waist” “flash waist”, usually due to excessive lumbar weight, uncoordinated force, excessive forward flexion, back extension and direct blow caused. Therefore, in daily life, reduce the opportunity to bend the waist (forward bending) weight, try to squat to lift heavy objects, and reduce other trauma to the waist, can greatly reduce the chances of lumbar sprain.