Reflex pain, also called diffuse pain, usually refers to pain felt in the anterior part of the corresponding anterior branch on the same nerve after stimulation by the posterior branch of the spinal nerve, and the patient can roughly describe the pain conduction path. The pathogenesis of this disease is complex, if you suffer from acute pancreatitis, retroperitoneal hematoma or tumor, penetrating ulcers of the posterior wall of the duodenum can cause visceral reflex lower back pain, such as genitourinary disorders, pelvic organ lesions, especially gynecological diseases, such as adnexitis and pelvic inflammatory disease, can also be through the pelvic plexus and the sciatic nerve reflex caused by the lumbar-sacral region, as well as the posterior thighs and buttocks pain. Reflex pain should be timely to the hospital for further examination, to clarify the cause of the disease, and actively cooperate with the doctor to carry out targeted treatment, so as to avoid delaying the condition.