What causes pain on one side of the buttocks?

Pain on one side of the buttocks may be caused by various factors: 1. Lumbar spine problems: For example, lumbar disc herniation, in which the intervertebral disc protrudes backward and compresses nerve roots, potentially causing pain in the lower back and one or both sides of the buttocks, and even radiating pain down the leg. 2. Sciatica: Mainly caused by prolonged improper sitting posture or compression of the sciatic nerve, manifesting as localized pain and numbness. 3. Local injury: Trauma from falls, collisions, or other external forces can lead to significant pain and swelling. 4. Other factors: Muscle strain, piriformis syndrome, lumbar spinal stenosis, and similar conditions may also cause pain on one side of the buttocks. Given the wide range of possible causes, individuals experiencing unilateral buttock pain should seek timely medical evaluation. A healthcare professional can perform appropriate examinations and diagnosis to identify the specific cause and recommend suitable treatment.