Many diseases can cause buttock pain, common lumbar disc herniation, hip osteoarthritis, muscle strain and so on. 1. Lumbar disc herniation: due to the degeneration of lumbar intervertebral discs, the fibrous annulus ruptures partially or completely, and the nucleus pulposus protrudes to irritate or oppress the peripheral nerve roots and the cauda equina, causing a syndrome, manifested as lumbar pain, buttock soreness, often accompanied by numbness of the lower limbs and other symptoms. 2. Hip arthritis: caused by long-term weight-bearing imbalance of the hip joint surface, mainly manifested as pain and soreness in the outer buttocks, groin and other parts of the buttocks, which may be accompanied by joint effusion, bone spur hyperplasia and other changes. 3. Muscle strain: due to long-term over-activity, it can lead to hip muscle strain or strain injury, excessive muscle tension causes excessive accumulation of lactic acid, causing buttock soreness. Sore buttocks may have other causes such as ankylosing spondylitis, etc. If the pain is not relieved for a long time, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease and standardize the treatment.