L4-5 disc herniation backward is not too serious if there is no leg pain and numbness symptoms, if there is leg pain and numbness serious enough. L4-5 backward herniation will cause different degrees of dural sac compression, if the herniation range is not large, the compression is not obvious, no leg pain and numbness, usually not serious, the patient has low back pain, usually no leg pain and numbness symptoms, you can take conservative treatment, lumbar spine traction, in favor of the compression relief, with the lumbar and dorsal muscles exercise, acupuncture and physiotherapy symptoms can be relieved. If the dural sac compression is serious, accompanied by nerve root compression, leg pain and leg numbness, weakness, intermittent claudication, this situation is more serious, need to take minimally invasive surgery to remove the protruding disc, to relieve the compression. Therefore, L4L5 backward herniation needs to go to orthopedics or spine surgery, and the doctor will take further treatment according to the degree of herniation and the patient’s symptoms.