Half of the buttock pain may be caused by physiological reasons such as overwork, or it may be caused by hip fasciitis, sacroiliac joint disease, lumbar spine disease and other reasons. 1. Overexertion: it is common that the metabolic products such as lactic acid accumulate in the gluteal muscles such as the gluteus maximus muscle caused by long-term walking or standing, and the patient may have the symptom of half buttock pain. 2. Trauma: due to the external violence caused by one side of the buttock muscle, bone and other tissues of the injury, the patient may appear half of the buttock pain, swelling and other symptoms. 3. gluteal fasciitis: due to long-term strain, friction and other causes of local soft tissue aseptic inflammation, the patient appears half buttock pain symptoms. 4. Sacroiliac joint disease: such as femoral head necrosis, sacroiliac arthritis and other diseases, if occurring on one side, can cause the patient to appear half of the buttock pain symptoms. 5. Lumbar spine diseases: common lumbar disc herniation, lumbar spinal stenosis, lumbar spine slippage and other diseases, compression of one side of the nerve root, thus causing half of the buttock pain. Half of the buttock pain may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.