What might cause tailbone pain?

Coccyx: Coccyx or your tail bone can become painful. It usually goes away quickly. If not you need a work up.

See below: The tailbone or "coccyx" is the small trail of bones that connect to the end of your sacrum, and form the end of your spine. A painful tailbone can come from several things. Trauma to the tailbone which might occur with a fall. An abnormally positioned tailbone that is under stress with prolonged siting, and in very rare cases abnormal growths can occur on the tailbone.