Doctors may call it coccydynia. Pain in the tailbone or coccyx, the lowest part of the spine, may radiate to the hips, thighs, or rectum. This pain can make sitting difficult, exercise painful ...

The spine (aka backbone) is a linked column of bones running from ... There are 3 to 5 coccygeal vertebrae, which are fused as one bone and known as the coccyx (commonly known as the tailbone), in the ...