Pain in the butt, or buttocks, can be caused by a dislocated or injured tailbone. In many cases the pain is caused by falling on the buttocks, or by childbirth, but in about a third of cases the cause is unknown.
The tailbone consists of three to five small bones, attached to the sacrum. These bones are sometimes fused together in groups, but more often have thin disks between them, allowing the coccyx to flex a little. Falling on the buttocks causes immediate pain, but it can also cause chronic pain, most often brought on when you sit on your butt, or in some cases a sudden pain when rising from sitting.
Buttock pain, or coccydynia, can also come from several other causes, described in What is coccydynia?.
There are several treatments for this type of buttock pain, including manipulating the tailbone, injections, exercises, and if all else fails, removing the tailbone.
For further information, see: Investigation and diagnosis Treatment Coping with coccyx pain Find a doctor or specialist