Lumbar spine pain on the buttock side in girls may be due to fasciitis, sciatic nerve entrapment, autoimmune diseases and other causes. Treatment can choose to adjust the life, work status, rehabilitation training, physical therapy and drug therapy. 1. Fasciitis: these patients are firstly recommended to rest and recuperate, and at the same time adjust the hardness of the mattress, avoid standing and sitting for a long time; secondly, you can choose hot compresses, massages, deep microwave, etc., to relax the surrounding muscle tissues. 2. Sciatic nerve compression: mild nerve compression patients can carry out rehabilitation training, such as swallow fly, hip bridge, etc., to strengthen the strength of the lumbar and dorsal muscles, reduce the symptoms of compression. Patients with pain caused by compression can take oral ibuprofen, meloxicam and other painkillers; you can also choose mannitol, methylcobalamin and other anti-swelling, nutritive nerve drugs. 3. Patients with autoimmune diseases: Patients with autoimmune diseases can take oral antirheumatic drugs such as sulfasalazine and methotrexate tablets, as well as injections of biological agents. The above drugs should be used under the guidance of a doctor, and avoid self-medication. If the pain is not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to identify the cause and give targeted treatment.