Knee meniscus injury usually does not cause back pain. If back pain occurs, it is recommended to go to the hospital in time. Different treatments, such as oral medication, physical therapy and surgery, are needed depending on the cause and severity of the knee meniscus injury. If the meniscus injury of young people is within the second degree, they can choose conservative treatment and use plaster cast to fix it. If the third degree of injury can also choose meniscus suture treatment. If the meniscus injury is caused by degeneration, it can be treated by wearing knee pads, taking anti-inflammatory and analgesic drugs such as nimesulide, diclofenac sodium and dextrose sulphate, or intra-articular injection of sodium vitrate when the pain is mild. If the pain is severe, artificial joint replacement can also be chosen, such as total knee replacement or unicondylar replacement. If the low back pain is caused by a herniated disc, such as spinal stenosis, it can be treated by resting hot compresses, massage, physical therapy, and oral pain medication. If the nerve compression is severe, surgical treatment such as decompression of the spinal canal, bone graft fusion and internal fixation can also be chosen. If the low back pain is caused by lumbar fasciitis, strain injury, etc., it can be treated by rest, physical therapy and oral painkillers. If the low back pain is caused by internal organ disease, such as kidney abscess, chronic nephritis, etc. need to treat the primary disease. If the knee meniscus injury combined with low back pain, it is recommended that the patient go to the hospital to improve the examination and regular treatment.