The etiology of lumbar pain is complex and may be related to lumbar spine disease, trauma, urological disease or tumor, which can be treated in orthopedics, urology or oncology. 1. Orthopedics: The most common cause of lumbar pain is the lesion of the lumbar spine itself, such as lumbar muscle strain, lumbar disc herniation, lumbar spinal stenosis, etc., which may cause lumbar pain and activity limitation, so you can go to orthopedics for medical treatment. Trauma is also the main cause of lumbar pain, including car accidents, impact injuries, causing lumbar vertebrae fracture or slipped disc, you can go to the orthopedic department. 2. Urological diseases: In addition to the lumbar pain related to the lumbar disease itself, it may also be related to urinary diseases, such as kidney stones, urinary tract infections, etc., which may trigger the symptoms of lumbar pain, and at this time, you can go to the Department of urology for medical treatment. 3. Oncology: waist pain may also be related to tumor diseases, the most common one is bone cancer, and when other tumors develop bone metastasis, symptoms of waist pain will also appear, at this time, you should go to oncology department for medical treatment. The causes of back pain are complicated and various, so you can go to the corresponding department for medical treatment according to your actual condition.