The severity of lumbar fluid accumulation depends on the specific case. If the fluid accumulation in the subcutaneous fat layer of the lumbar back is caused by traumatic stimulation or strain, it mostly suggests a sterile inflammatory reaction due to local edema. Most patients present with soreness, swelling, or tingling pain in the low back, which can be induced by hand pressure, and can be aggravated by hand percussion, with significant limitation of lumbar flexion and extension. In this case, the degree of disease is relatively mild, and most of the pain symptoms can be significantly relieved by paying attention to rest, with local hot compress treatment to promote blood circulation, so that the edema reaction can subside as soon as possible, and if necessary, the symptomatic treatment can be supplemented by non-steroidal anti-inflammatory and analgesic drugs. In the case of fluid in the lumbar spinal canal, it may be due to hemorrhage in the spinal canal or trauma resulting in blood accumulation. Generally the clinical symptoms are heavy, there may be symptoms of nerve compression, if necessary, surgery may be required, the relative condition is more serious.