Patient presents with complaints of low back pain, localized to the sacroiliac joint region, possibly radiating to the buttock, groin, or thigh.  Symptoms may include pain with weight-bearing activities, prolonged standing or sitting, and transitional movements such as rising from a chair or climbing stairs.  On physical examination, tenderness to palpation over the sacroiliac joint, positive provocation tests such as the FABER test, Gaenslen's test, or compression distraction test, and restricted range of motion in the lumbar spine may be observed.  Differential diagnosis includes lumbar disc herniation, piriformis syndrome, and hip osteoarthritis.  Diagnosis of sacroiliac joint dysfunction is based on clinical findings, with imaging such as X-ray, MRI, or CT scan generally not indicated unless there is suspicion of underlying pathology.  Treatment plan may include conservative management with physical therapy focusing on core strengthening, stretching, and mobilization of the sacroiliac joint, as well as pain management with NSAIDs, analgesics, or muscle relaxants.  Sacroiliac joint injections, including corticosteroid injections or prolotherapy, may be considered for patients who do not respond to conservative treatment.  Patient education on proper body mechanics and activity modification is crucial.  Follow-up care is recommended to monitor symptom improvement and adjust treatment as needed. The patient's prognosis for recovery from sacroiliac joint dysfunction is generally good with appropriate management.