Sudden cramp-like pain in the buttocks can be caused by the following common reasons: first, acute violent injury that causes tearing of the muscle fibers in the buttocks, which can produce severe cramp-like pain, along with obvious dysfunction; second, it can be seen in local muscle dysfunction, which is mainly caused by functional factors, such as long-term chronic strain, inflammatory stimulation, and cold, thus If the contraction is serious, it will lead to cramp-like pain; thirdly, it can be seen in sciatica, where the sciatic nerve, such as cold, sciatic neuritis or sciatic nerve compression, such as lumbar diseases, can also cause sciatic nerve root compression, resulting in sciatica and cramp-like pain in the buttocks. It is recommended that patients go to the hospital for a definite diagnosis.