The duration of pain caused by a fall on the buttocks is related to the severity of the trauma, because the fall on the buttocks is likely to cause a fracture of the tailbone, and may also cause a fracture of the lumbar vertebrae, as follows: 1, about one month: if the pain is in the lumbar spine, lumbar, we should be highly suspicious of lumbar vertebrae fracture, which should be confirmed by X-photographs. If the X-ray shows lumbar spine fracture, absolute bed rest, pain relief time is usually in about a month. If the X-ray shows a fracture of the sacrum or coccyx, the pain is mainly in the sacrococcygeal area, and the pain relief time is also about one month. 2, two weeks or so: If there is no fracture at the time of the fall, it is considered to be a soft-tissue contusion, and the relief time is usually about two weeks.